90=3x+2x

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Solution for 90=3x+2x equation:


Simplifying
90 = 3x + 2x

Combine like terms: 3x + 2x = 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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