Maths-
General
Easy

Question

Determine the number of solutions for each equation:
a)x+3+7= 2x-10-x

hintHint:

1. An equation where no value can be substituted for the variable which will satisfy the equation i.e. for no value of x (or any other variable in the equation), would LHS equal RHS.
Hence, an equation where LHS ≠ RHS for any value of x has no solutions.
2. When Both sides of an equation are equal, the said equation is said to have infinitely many solutions.
3. When after simplifying the equation, we get a single value for the variable in the equation, the equation is said to have only 1 solution.

The correct answer is: The given equations a)x + 3 + 7= 2x-10-x; b)3(x+4)= 3x+12 and c)5x+8= 2x-1 have No solution, Infinitely many solutions and 1 solution, respectively.


    Step-by-step solution:-
    a)x+3+7= 2x-10-x
    Simplifying the given equation i.e. x+3+7= 2x - 10 - x, we get-
    x + 3 + 7 = 2x - 10 - x
    ∴ x - 2x + x = - 10 - 3 - 7
    ∴ 0 ≠ - 20
    ∴ LHS ≠ RHS
    Since in the above equation, LHS is not equal to RHS, the given equation has no solutions.
    b)3(x+4)= 3x + 12
    Simplifying the given equation i.e. 3(x+4)= 3x + 12, we get-
    3 (x + 4) = 3x + 12
    ∴ 3x + 12 = 3x + 12
    ∴ LHS = RHS
    Since, after simplifying the above equation, we get both sides of the equation equal to each other, the given equation has infinitely many solutions.
    c)5x + 8 = 2x - 1
    Simplifying the given equation i.e. 5x + 8 = 2x - 1, we get-
    5x + 8 = 2x - 1
    ∴ 5x - 2x = - 1 - 8 .............................. (Taking variables and constants on either sides of the equation)
    ∴ 3x = -9
    ∴ x = - 3 ................................. (Dividing both sides by 3)
    Since after simplifying the given equation, we get a single value of x i.e. -3 that will satisfy the given equation, we can conclude that the given equation has 1 solution.
    Final Answer:-
    ∴ The given equations a)x + 3 + 7= 2x-10-x; b)3(x+4)= 3x+12 and c)5x+8= 2x-1 have No solution, Infinitely many solutions and 1 solution, respectively.
     

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