What is the value of x in the equation, 70 = 12 + 9x – 2(x + 6)

Question

What is the value of x in the equation, 70 = 12 + 9x – 2(x + 6)

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Edana Edana 4 years 2021-07-29T03:11:16+00:00 2 Answers 12 views 0

Answers ( )

  1. thucuc
    0
    2021-07-29T03:12:52+00:00
    Reply

    Answer:

    x = 10

    Step-by-step explanation:

    In this question, we would be solving for the x-variable.

    Solve:

    70 = 12 + 9x – 2(x + 6)

    Use the “distributive property”:

    70 = 12 + 9x – 2x – 12

    Combine like terms:

    70 = 12 + 7x – 12

    70 = 7x

    Divide both sides by 7 to get the variable “x” by itself:

    10 = x

  2. Nem
    0
    2021-07-29T03:13:03+00:00
    Reply

    Solution :-

    ➩ 70 = 12 + 9x – 2 ( x + 6 )

    ➩ 70 = 12 + 9x – 2x – 12

    ➩ 70 = 0 + 7x

    ➩ 70 = 7x

    Here we can use 2 methods

    Methods :–

    1. Trial and error method :- By adding,subtracting , multiplying or dividing the same variable or constant on LHS & RHS
    2. Transposing :- by transposing a term from LHS to RHS or RHS to LHS

    • Trial and error

    By dividing with 7 on both sides

    ➩ 70/7 = 7x/7

    ➩ x = 10

    • Transposing

    By transposing 7 from RHS. to LHS

    ➩ 70/7 = x

    ➩ x = 10

    Hence , x = 10

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