Mathematics
Grade-7
Easy

Question

The simplified form of this expression is?
3x + 4 + 5x + 3

  1. 15x    
  2. 8x + 7    
  3. 7x + 8    
  4. 5x    

hintHint:

General Expression evaluation is needed to solver this problem.

The correct answer is: 8x + 7


    Given Expression:
    3x + 4 + 5x + 3
    >>>first step is to reduce the given expression using reduction of like terms using the operation existing in between them.
    >>Like terms present in the expression are 3x, 5x and 4, 3 .Then,
    * Hence, the expression 3x + 4 + 5x + 3 becomes:
    3x + 4 + 5x + 3
    = (3x + 5x) +(4 + 3)
    = 8x + 7.
    *** Hence, the expression 3x + 4 + 5x + 3 is equals to 8x + 7 .


    In Mathematics, general simplification of the expression is evaluated using the properties of the variables.

    ** Like terms can perform any operation defined in the expression.

    ** Unlike terms are remained unevaluated after the evaluation of the like terms present in the expression.

    ** Hence, Simplification of the expression should follow above rules.

    Example to show expression evaluation: a + a = 2a ; 2a-a = a ; are the correct evaluation of the like terms where as

    a-b = a-b is the example for evaluation for the evaluation of the unlike terms.

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    w + w + w could be simplified as?

    Given Expression:
    w+ w+ w
    >>> First step is to reduce like terms present in the expression by using the operation existing in between them.
    >>> Hence, The expression becomes:
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    =3w.
    ***Therefore, we can say that the given expression w+ w+  becomes 3w.

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    Given Expression:
    w+ w+ w
    >>> First step is to reduce like terms present in the expression by using the operation existing in between them.
    >>> Hence, The expression becomes:
    w+ w+ w
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    ***Therefore, we can say that the given expression w+ w+  becomes 3w.

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    Add these expressions (3x + 15) + (4x + 13)

    Given Expression:
    (3x + 15) + (4x + 13)'
    >>> First step is to find the like terms and then reduce them using their operation existing in between them.
    * Hence, The like terms present in the expression are 3x, 4x and 15, 13.
    * Then, the expression becomes
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    = 3x+ 4x + 15 + 13
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    * Therefore, the expression (3x + 15) + (4x + 13) is equals to 7x +28.

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    Given Expression:
    (3x + 15) + (4x + 13)'
    >>> First step is to find the like terms and then reduce them using their operation existing in between them.
    * Hence, The like terms present in the expression are 3x, 4x and 15, 13.
    * Then, the expression becomes
    (3x + 15) + (4x + 13)
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    = 7x +28.
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    Add these expressions (x + 5) + (2x + 10)

    Given Expression:
    (x + 5) + (2x + 10)
    >>> First step is to reduce the given expression without any parenthesis. Then:
    (x + 5) + (2x + 10)
    = x + 5 + 2x +10
    >>> second step is to reduce the like terms by performing operations in between them.
    Like terms are x,2x and 5,10.
    Then, the Expression becomes:
    = x + 5 + 2x + 10
    = 3x + 15.
    * Hence, the expression (x + 5) + (2x + 10) becomes 3x + 15 after it's evaluation.

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    Given Expression:
    (x + 5) + (2x + 10)
    >>> First step is to reduce the given expression without any parenthesis. Then:
    (x + 5) + (2x + 10)
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    >>> second step is to reduce the like terms by performing operations in between them.
    Like terms are x,2x and 5,10.
    Then, the Expression becomes:
    = x + 5 + 2x + 10
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    * Hence, the expression (x + 5) + (2x + 10) becomes 3x + 15 after it's evaluation.

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    Given expression:
    4x - 6a + 5a - 2x
    >>> Like terms present in the expression are 4x, -2x and -6a, 5a.
    >>>Perform reduction on the like terms, then
    4x - 6a + 5a - 2x
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    Given Expression:
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