-9=-x-3y

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Solution for -9=-x-3y equation:


Simplifying
-9 = -1x + -3y

Solving
-9 = -1x + -3y

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.
-9 + x = -1x + x + -3y

Combine like terms: -1x + x = 0
-9 + x = 0 + -3y
-9 + x = -3y

Add '9' to each side of the equation.
-9 + 9 + x = 9 + -3y

Combine like terms: -9 + 9 = 0
0 + x = 9 + -3y
x = 9 + -3y

Simplifying
x = 9 + -3y

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