90=7x+3x

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Solution for 90=7x+3x equation:


Simplifying
90 = 7x + 3x

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

Solving
90 = 10x

Solving for variable 'x'.

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

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

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

Add '-90' to each side of the equation.
90 + -90 + -10x = 0 + -90

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

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

Divide each side by '-10'.
x = 9

Simplifying
x = 9

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