Maths-
General
Easy

Question

fraction numerator x over denominator x minus 3 end fraction equals fraction numerator 2 x over denominator 2 end fraction
Which of the following represents all the possible values of x that satisfy the equation above?

  1. 0 and 2
  2. 0 and 4
  3. –4 and 4
  4. 4

The correct answer is: 0 and 4


    ○        The concept used in this question is concept of the equation.
    ○        In this question, equation with one variable is used, which contain only one variable.
    ○        In equation, LHS = RHS, always.
    ○        While solving separate the variable term and constant to get the solution
    • Step by step explanation:
    ○        Given:
     fraction numerator x over denominator x minus 3 end fraction equals fraction numerator 2 x over denominator 2 end fraction
    ○        Step 1:
    Cross multiply both side
     fraction numerator x over denominator x minus 3 end fraction equals fraction numerator 2 x over denominator 2 end fraction
    2x = 2x(x - 3)
    2x = 2x2 - 6x
    ○        Step 2:
    ○        Rearrange the like term
    2x2 - 6x - 2x = 0
    2x2 - 8x = 0
    ○        Step 3:
    ○        Take x common from both terms
    x(2x - 8) = 0
    (x) (2x - 8) = 0
    ○        Step 3:
    ○        Equate both terms to zero
     x = 0
    and
    2x - 8 = 0
    2x  = 8
    x  = 8 over 2
    x  = 4
    Hence, the value of x which satisfy above equation are 0 and 4.
    • Final Answer:
    Correct option is,
    Option B. 0 and 4.

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