2x+3x=90.0

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Solution for 2x+3x=90.0 equation: 


Simplifying
2x + 3x = 90.0

Combine like terms: 2x + 3x = 5x
5x = 90.0

Solving
5x = 90.0

Solving for variable 'x'.

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

Divide each side by '5'.
x = 18

Simplifying
x = 18

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