12x-3y=-21

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Solution for 12x-3y=-21 equation: 


Simplifying
12x + -3y = -21

Solving
12x + -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.
12x + -3y + 3y = -21 + 3y

Combine like terms: -3y + 3y = 0
12x + 0 = -21 + 3y
12x = -21 + 3y

Divide each side by '12'.
x = -1.75 + 0.25y

Simplifying
x = -1.75 + 0.25y

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