x+7y=90

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Solution for x+7y=90 equation: 


Simplifying
x + 7y = 90

Solving
x + 7y = 90

Solving for variable 'x'.

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

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

Combine like terms: 7y + -7y = 0
x + 0 = 90 + -7y
x = 90 + -7y

Simplifying
x = 90 + -7y

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