9y+20=5y-20

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Solution for 9y+20=5y-20 equation: 


Simplifying
9y + 20 = 5y + -20

Reorder the terms:
20 + 9y = 5y + -20

Reorder the terms:
20 + 9y = -20 + 5y

Solving
20 + 9y = -20 + 5y

Solving for variable 'y'.

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

Add '-5y' to each side of the equation.
20 + 9y + -5y = -20 + 5y + -5y

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

Combine like terms: 5y + -5y = 0
20 + 4y = -20 + 0
20 + 4y = -20

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

Combine like terms: 20 + -20 = 0
0 + 4y = -20 + -20
4y = -20 + -20

Combine like terms: -20 + -20 = -40
4y = -40

Divide each side by '4'.
y = -10

Simplifying
y = -10

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