129-(7x-12)=7(x+6)+x

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Solution for 129-(7x-12)=7(x+6)+x equation:


Simplifying
129 + -1(7x + -12) = 7(x + 6) + x

Reorder the terms:
129 + -1(-12 + 7x) = 7(x + 6) + x
129 + (-12 * -1 + 7x * -1) = 7(x + 6) + x
129 + (12 + -7x) = 7(x + 6) + x

Combine like terms: 129 + 12 = 141
141 + -7x = 7(x + 6) + x

Reorder the terms:
141 + -7x = 7(6 + x) + x
141 + -7x = (6 * 7 + x * 7) + x
141 + -7x = (42 + 7x) + x

Combine like terms: 7x + x = 8x
141 + -7x = 42 + 8x

Solving
141 + -7x = 42 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
141 + -7x + -8x = 42 + 8x + -8x

Combine like terms: -7x + -8x = -15x
141 + -15x = 42 + 8x + -8x

Combine like terms: 8x + -8x = 0
141 + -15x = 42 + 0
141 + -15x = 42

Add '-141' to each side of the equation.
141 + -141 + -15x = 42 + -141

Combine like terms: 141 + -141 = 0
0 + -15x = 42 + -141
-15x = 42 + -141

Combine like terms: 42 + -141 = -99
-15x = -99

Divide each side by '-15'.
x = 6.6

Simplifying
x = 6.6

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