7x=90-x

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Solution for 7x=90-x equation: 


Simplifying
7x = 90 + -1x

Solving
7x = 90 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
7x + x = 90 + -1x + x

Combine like terms: 7x + x = 8x
8x = 90 + -1x + x

Combine like terms: -1x + x = 0
8x = 90 + 0
8x = 90

Divide each side by '8'.
x = 11.25

Simplifying
x = 11.25

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