21x-7y=-42

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Solution for 21x-7y=-42 equation: 


Simplifying
21x + -7y = -42

Solving
21x + -7y = -42

Solving for variable 'x'.

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

Add '7y' to each side of the equation.
21x + -7y + 7y = -42 + 7y

Combine like terms: -7y + 7y = 0
21x + 0 = -42 + 7y
21x = -42 + 7y

Divide each side by '21'.
x = -2 + 0.3333333333y

Simplifying
x = -2 + 0.3333333333y

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