-4y+15=-9y-20

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Solution for -4y+15=-9y-20 equation: 


Simplifying
-4y + 15 = -9y + -20

Reorder the terms:
15 + -4y = -9y + -20

Reorder the terms:
15 + -4y = -20 + -9y

Solving
15 + -4y = -20 + -9y

Solving for variable 'y'.

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

Add '9y' to each side of the equation.
15 + -4y + 9y = -20 + -9y + 9y

Combine like terms: -4y + 9y = 5y
15 + 5y = -20 + -9y + 9y

Combine like terms: -9y + 9y = 0
15 + 5y = -20 + 0
15 + 5y = -20

Add '-15' to each side of the equation.
15 + -15 + 5y = -20 + -15

Combine like terms: 15 + -15 = 0
0 + 5y = -20 + -15
5y = -20 + -15

Combine like terms: -20 + -15 = -35
5y = -35

Divide each side by '5'.
y = -7

Simplifying
y = -7

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