-3(5x-7y-9x)=

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Solution for -3(5x-7y-9x)= equation: 


Simplifying
-3(5x + -7y + -9x) = 0

Reorder the terms:
-3(5x + -9x + -7y) = 0

Combine like terms: 5x + -9x = -4x
-3(-4x + -7y) = 0
(-4x * -3 + -7y * -3) = 0
(12x + 21y) = 0

Solving
12x + 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.
12x + 21y + -21y = 0 + -21y

Combine like terms: 21y + -21y = 0
12x + 0 = 0 + -21y
12x = 0 + -21y
Remove the zero:
12x = -21y

Divide each side by '12'.
x = -1.75y

Simplifying
x = -1.75y

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