-7x-3y=21

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Solution for -7x-3y=21 equation: 


Simplifying
-7x + -3y = 21

Solving
-7x + -3y = 21

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.
-7x + -3y + 3y = 21 + 3y

Combine like terms: -3y + 3y = 0
-7x + 0 = 21 + 3y
-7x = 21 + 3y

Divide each side by '-7'.
x = -3 + -0.4285714286y

Simplifying
x = -3 + -0.4285714286y

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