7(3x-4)-(8x-12)=3(2x+4)

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Solution for 7(3x-4)-(8x-12)=3(2x+4) equation:


Simplifying
7(3x + -4) + -1(8x + -12) = 3(2x + 4)

Reorder the terms:
7(-4 + 3x) + -1(8x + -12) = 3(2x + 4)
(-4 * 7 + 3x * 7) + -1(8x + -12) = 3(2x + 4)
(-28 + 21x) + -1(8x + -12) = 3(2x + 4)

Reorder the terms:
-28 + 21x + -1(-12 + 8x) = 3(2x + 4)
-28 + 21x + (-12 * -1 + 8x * -1) = 3(2x + 4)
-28 + 21x + (12 + -8x) = 3(2x + 4)

Reorder the terms:
-28 + 12 + 21x + -8x = 3(2x + 4)

Combine like terms: -28 + 12 = -16
-16 + 21x + -8x = 3(2x + 4)

Combine like terms: 21x + -8x = 13x
-16 + 13x = 3(2x + 4)

Reorder the terms:
-16 + 13x = 3(4 + 2x)
-16 + 13x = (4 * 3 + 2x * 3)
-16 + 13x = (12 + 6x)

Solving
-16 + 13x = 12 + 6x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-6x' to each side of the equation.
-16 + 13x + -6x = 12 + 6x + -6x

Combine like terms: 13x + -6x = 7x
-16 + 7x = 12 + 6x + -6x

Combine like terms: 6x + -6x = 0
-16 + 7x = 12 + 0
-16 + 7x = 12

Add '16' to each side of the equation.
-16 + 16 + 7x = 12 + 16

Combine like terms: -16 + 16 = 0
0 + 7x = 12 + 16
7x = 12 + 16

Combine like terms: 12 + 16 = 28
7x = 28

Divide each side by '7'.
x = 4

Simplifying
x = 4

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