9y+20=4y-20

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


Simplifying
9y + 20 = 4y + -20

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

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

Solving
20 + 9y = -20 + 4y

Solving for variable 'y'.

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

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

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

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

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

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

Combine like terms: -20 + -20 = -40
5y = -40

Divide each side by '5'.
y = -8

Simplifying
y = -8

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