90+3x+7x=180

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Solution for 90+3x+7x=180 equation: 


Simplifying
90 + 3x + 7x = 180

Combine like terms: 3x + 7x = 10x
90 + 10x = 180

Solving
90 + 10x = 180

Solving for variable 'x'.

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

Add '-90' to each side of the equation.
90 + -90 + 10x = 180 + -90

Combine like terms: 90 + -90 = 0
0 + 10x = 180 + -90
10x = 180 + -90

Combine like terms: 180 + -90 = 90
10x = 90

Divide each side by '10'.
x = 9

Simplifying
x = 9

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