3(-x-4y)-4(5y+7x)=

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Solution for 3(-x-4y)-4(5y+7x)= equation: 


Simplifying
3(-1x + -4y) + -4(5y + 7x) = 0
(-1x * 3 + -4y * 3) + -4(5y + 7x) = 0
(-3x + -12y) + -4(5y + 7x) = 0

Reorder the terms:
-3x + -12y + -4(7x + 5y) = 0
-3x + -12y + (7x * -4 + 5y * -4) = 0
-3x + -12y + (-28x + -20y) = 0

Reorder the terms:
-3x + -28x + -12y + -20y = 0

Combine like terms: -3x + -28x = -31x
-31x + -12y + -20y = 0

Combine like terms: -12y + -20y = -32y
-31x + -32y = 0

Solving
-31x + -32y = 0

Solving for variable 'x'.

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

Add '32y' to each side of the equation.
-31x + -32y + 32y = 0 + 32y

Combine like terms: -32y + 32y = 0
-31x + 0 = 0 + 32y
-31x = 0 + 32y
Remove the zero:
-31x = 32y

Divide each side by '-31'.
x = -1.032258065y

Simplifying
x = -1.032258065y

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