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27 December, 13:53

9. Solve the equation.

x + 4 = 3 (3x - 4)

A 9

4

B 1

C 2

Lounge

D 7

4

+5
Answers (2)
  1. 27 December, 14:23
    0
    x=2

    Step-by-step explanation:

    x + 4 = 3 (3x - 4)

    Distribute

    x+4 = 9x - 12

    Subtract x from each side

    x+4 - x = 9x-x-12

    4 = 8x-12

    Add 12 to each side

    4+12 = 8x-12+12

    16 = 8x

    Divide by 8

    16/8 = 8x/8

    2 = x
  2. 27 December, 14:23
    0
    x = 2

    Step-by-step explanation:

    x + 4 = 3 (3x - 4)

    Expand the brackets.

    x + 4 = 9x - 12

    Add - x and 12 on both sides.

    4 + 12 = 9x - x

    16 = 8x

    Divide 8 into both sides.

    16/8 = x

    2 = x

    Switch sides.

    x = 2
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