-x-3y=-7

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Solution for -x-3y=-7 equation: 


Simplifying
-1x + -3y = -7

Solving
-1x + -3y = -7

Solving for variable 'x'.

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

Add '3y' to each side of the equation.
-1x + -3y + 3y = -7 + 3y

Combine like terms: -3y + 3y = 0
-1x + 0 = -7 + 3y
-1x = -7 + 3y

Divide each side by '-1'.
x = 7 + -3y

Simplifying
x = 7 + -3y

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