(-3y-9y)+(5y+2y-4)=

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Solution for (-3y-9y)+(5y+2y-4)= equation:


Simplifying
(-3y + -9y) + (5y + 2y + -4) = 0

Combine like terms: -3y + -9y = -12y
(-12y) + (5y + 2y + -4) = 0
(-12y) + (5y + 2y + -4) = 0

Reorder the terms:
(-12y) + (-4 + 5y + 2y) = 0

Combine like terms: 5y + 2y = 7y
(-12y) + (-4 + 7y) = 0

Remove parenthesis around (-4 + 7y)
(-12y) + -4 + 7y = 0

Reorder the terms:
-4 + (-12y) + 7y = 0

Combine like terms: (-12y) + 7y = -5y
-4 + -5y = 0

Solving
-4 + -5y = 0

Solving for variable 'y'.

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

Add '4' to each side of the equation.
-4 + 4 + -5y = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -5y = 0 + 4
-5y = 0 + 4

Combine like terms: 0 + 4 = 4
-5y = 4

Divide each side by '-5'.
y = -0.8

Simplifying
y = -0.8

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