31+3y-12=15y-9-5y

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Solution for 31+3y-12=15y-9-5y equation: 


Simplifying
31 + 3y + -12 = 15y + -9 + -5y

Reorder the terms:
31 + -12 + 3y = 15y + -9 + -5y

Combine like terms: 31 + -12 = 19
19 + 3y = 15y + -9 + -5y

Reorder the terms:
19 + 3y = -9 + 15y + -5y

Combine like terms: 15y + -5y = 10y
19 + 3y = -9 + 10y

Solving
19 + 3y = -9 + 10y

Solving for variable 'y'.

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

Add '-10y' to each side of the equation.
19 + 3y + -10y = -9 + 10y + -10y

Combine like terms: 3y + -10y = -7y
19 + -7y = -9 + 10y + -10y

Combine like terms: 10y + -10y = 0
19 + -7y = -9 + 0
19 + -7y = -9

Add '-19' to each side of the equation.
19 + -19 + -7y = -9 + -19

Combine like terms: 19 + -19 = 0
0 + -7y = -9 + -19
-7y = -9 + -19

Combine like terms: -9 + -19 = -28
-7y = -28

Divide each side by '-7'.
y = 4

Simplifying
y = 4

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