7x-21y=84

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Solution for 7x-21y=84 equation: 


Simplifying
7x + -21y = 84

Solving
7x + -21y = 84

Solving for variable 'x'.

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

Add '21y' to each side of the equation.
7x + -21y + 21y = 84 + 21y

Combine like terms: -21y + 21y = 0
7x + 0 = 84 + 21y
7x = 84 + 21y

Divide each side by '7'.
x = 12 + 3y

Simplifying
x = 12 + 3y

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