4y+12=9y-20

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Solution for 4y+12=9y-20 equation:


Simplifying
4y + 12 = 9y + -20

Reorder the terms:
12 + 4y = 9y + -20

Reorder the terms:
12 + 4y = -20 + 9y

Solving
12 + 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.
12 + 4y + -9y = -20 + 9y + -9y

Combine like terms: 4y + -9y = -5y
12 + -5y = -20 + 9y + -9y

Combine like terms: 9y + -9y = 0
12 + -5y = -20 + 0
12 + -5y = -20

Add '-12' to each side of the equation.
12 + -12 + -5y = -20 + -12

Combine like terms: 12 + -12 = 0
0 + -5y = -20 + -12
-5y = -20 + -12

Combine like terms: -20 + -12 = -32
-5y = -32

Divide each side by '-5'.
y = 6.4

Simplifying
y = 6.4

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