7x=90-8x

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Solution for 7x=90-8x equation: 


Simplifying
7x = 90 + -8x

Solving
7x = 90 + -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
7x + 8x = 90 + -8x + 8x

Combine like terms: 7x + 8x = 15x
15x = 90 + -8x + 8x

Combine like terms: -8x + 8x = 0
15x = 90 + 0
15x = 90

Divide each side by '15'.
x = 6

Simplifying
x = 6

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