3(-7x-7y)=3(7)

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


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

Multiply 3 * 7
-21x + -21y = 21

Solving
-21x + -21y = 21

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.
-21x + -21y + 21y = 21 + 21y

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

Divide each side by '-21'.
x = -1 + -1y

Simplifying
x = -1 + -1y

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