138-(7x-12)=7(x+3)+x

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Solution for 138-(7x-12)=7(x+3)+x equation:


Simplifying
138 + -1(7x + -12) = 7(x + 3) + x

Reorder the terms:
138 + -1(-12 + 7x) = 7(x + 3) + x
138 + (-12 * -1 + 7x * -1) = 7(x + 3) + x
138 + (12 + -7x) = 7(x + 3) + x

Combine like terms: 138 + 12 = 150
150 + -7x = 7(x + 3) + x

Reorder the terms:
150 + -7x = 7(3 + x) + x
150 + -7x = (3 * 7 + x * 7) + x
150 + -7x = (21 + 7x) + x

Combine like terms: 7x + x = 8x
150 + -7x = 21 + 8x

Solving
150 + -7x = 21 + 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.
150 + -7x + -8x = 21 + 8x + -8x

Combine like terms: -7x + -8x = -15x
150 + -15x = 21 + 8x + -8x

Combine like terms: 8x + -8x = 0
150 + -15x = 21 + 0
150 + -15x = 21

Add '-150' to each side of the equation.
150 + -150 + -15x = 21 + -150

Combine like terms: 150 + -150 = 0
0 + -15x = 21 + -150
-15x = 21 + -150

Combine like terms: 21 + -150 = -129
-15x = -129

Divide each side by '-15'.
x = 8.6

Simplifying
x = 8.6

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