90=(3x-8)+(x+2)

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Solution for 90=(3x-8)+(x+2) equation: 


Simplifying
90 = (3x + -8) + (x + 2)

Reorder the terms:
90 = (-8 + 3x) + (x + 2)

Remove parenthesis around (-8 + 3x)
90 = -8 + 3x + (x + 2)

Reorder the terms:
90 = -8 + 3x + (2 + x)

Remove parenthesis around (2 + x)
90 = -8 + 3x + 2 + x

Reorder the terms:
90 = -8 + 2 + 3x + x

Combine like terms: -8 + 2 = -6
90 = -6 + 3x + x

Combine like terms: 3x + x = 4x
90 = -6 + 4x

Solving
90 = -6 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
90 + -4x = -6 + 4x + -4x

Combine like terms: 4x + -4x = 0
90 + -4x = -6 + 0
90 + -4x = -6

Add '-90' to each side of the equation.
90 + -90 + -4x = -6 + -90

Combine like terms: 90 + -90 = 0
0 + -4x = -6 + -90
-4x = -6 + -90

Combine like terms: -6 + -90 = -96
-4x = -96

Divide each side by '-4'.
x = 24

Simplifying
x = 24

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