7x-12=8x-(9+4x)+3(7-x)

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Solution for 7x-12=8x-(9+4x)+3(7-x) equation:


Simplifying
7x + -12 = 8x + -1(9 + 4x) + 3(7 + -1x)

Reorder the terms:
-12 + 7x = 8x + -1(9 + 4x) + 3(7 + -1x)
-12 + 7x = 8x + (9 * -1 + 4x * -1) + 3(7 + -1x)
-12 + 7x = 8x + (-9 + -4x) + 3(7 + -1x)
-12 + 7x = 8x + -9 + -4x + (7 * 3 + -1x * 3)
-12 + 7x = 8x + -9 + -4x + (21 + -3x)

Reorder the terms:
-12 + 7x = -9 + 21 + 8x + -4x + -3x

Combine like terms: -9 + 21 = 12
-12 + 7x = 12 + 8x + -4x + -3x

Combine like terms: 8x + -4x = 4x
-12 + 7x = 12 + 4x + -3x

Combine like terms: 4x + -3x = 1x
-12 + 7x = 12 + 1x

Solving
-12 + 7x = 12 + 1x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-12 + 7x + -1x = 12 + 1x + -1x

Combine like terms: 7x + -1x = 6x
-12 + 6x = 12 + 1x + -1x

Combine like terms: 1x + -1x = 0
-12 + 6x = 12 + 0
-12 + 6x = 12

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

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

Combine like terms: 12 + 12 = 24
6x = 24

Divide each side by '6'.
x = 4

Simplifying
x = 4

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