31=3y-8

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Solution for 31=3y-8 equation:


Simplifying
31 = 3y + -8

Reorder the terms:
31 = -8 + 3y

Solving
31 = -8 + 3y

Solving for variable 'y'.

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

Add '-3y' to each side of the equation.
31 + -3y = -8 + 3y + -3y

Combine like terms: 3y + -3y = 0
31 + -3y = -8 + 0
31 + -3y = -8

Add '-31' to each side of the equation.
31 + -31 + -3y = -8 + -31

Combine like terms: 31 + -31 = 0
0 + -3y = -8 + -31
-3y = -8 + -31

Combine like terms: -8 + -31 = -39
-3y = -39

Divide each side by '-3'.
y = 13

Simplifying
y = 13

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