21x-3y=-7

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


Simplifying
21x + -3y = -7

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

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

Divide each side by '21'.
x = -0.3333333333 + 0.1428571429y

Simplifying
x = -0.3333333333 + 0.1428571429y

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