90=(x+12)+(x-4)

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Solution for 90=(x+12)+(x-4) equation:


Simplifying
90 = (x + 12) + (x + -4)

Reorder the terms:
90 = (12 + x) + (x + -4)

Remove parenthesis around (12 + x)
90 = 12 + x + (x + -4)

Reorder the terms:
90 = 12 + x + (-4 + x)

Remove parenthesis around (-4 + x)
90 = 12 + x + -4 + x

Reorder the terms:
90 = 12 + -4 + x + x

Combine like terms: 12 + -4 = 8
90 = 8 + x + x

Combine like terms: x + x = 2x
90 = 8 + 2x

Solving
90 = 8 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
90 + -2x = 8 + 2x + -2x

Combine like terms: 2x + -2x = 0
90 + -2x = 8 + 0
90 + -2x = 8

Add '-90' to each side of the equation.
90 + -90 + -2x = 8 + -90

Combine like terms: 90 + -90 = 0
0 + -2x = 8 + -90
-2x = 8 + -90

Combine like terms: 8 + -90 = -82
-2x = -82

Divide each side by '-2'.
x = 41

Simplifying
x = 41

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