90=2x+15+3x-15

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Solution for 90=2x+15+3x-15 equation:


Simplifying
90 = 2x + 15 + 3x + -15

Reorder the terms:
90 = 15 + -15 + 2x + 3x

Combine like terms: 15 + -15 = 0
90 = 0 + 2x + 3x
90 = 2x + 3x

Combine like terms: 2x + 3x = 5x
90 = 5x

Solving
90 = 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
90 + -5x = 5x + -5x

Combine like terms: 5x + -5x = 0
90 + -5x = 0

Add '-90' to each side of the equation.
90 + -90 + -5x = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -5x = 0 + -90
-5x = 0 + -90

Combine like terms: 0 + -90 = -90
-5x = -90

Divide each side by '-5'.
x = 18

Simplifying
x = 18

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