10(-9x-9y)=90

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Solution for 10(-9x-9y)=90 equation: 


Simplifying
10(-9x + -9y) = 90
(-9x * 10 + -9y * 10) = 90
(-90x + -90y) = 90

Solving
-90x + -90y = 90

Solving for variable 'x'.

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

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

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

Divide each side by '-90'.
x = -1 + -1y

Simplifying
x = -1 + -1y

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