7(x+3y)=

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Solution for 7(x+3y)= equation: 


Simplifying
7(x + 3y) = 0
(x * 7 + 3y * 7) = 0
(7x + 21y) = 0

Solving
7x + 21y = 0

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 = 0 + -21y

Combine like terms: 21y + -21y = 0
7x + 0 = 0 + -21y
7x = 0 + -21y
Remove the zero:
7x = -21y

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

Simplifying
x = -3y

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