12.5+3y=8

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Solution for 12.5+3y=8 equation: 


Simplifying
12.5 + 3y = 8

Solving
12.5 + 3y = 8

Solving for variable 'y'.

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

Add '-12.5' to each side of the equation.
12.5 + -12.5 + 3y = 8 + -12.5

Combine like terms: 12.5 + -12.5 = 0.0
0.0 + 3y = 8 + -12.5
3y = 8 + -12.5

Combine like terms: 8 + -12.5 = -4.5
3y = -4.5

Divide each side by '3'.
y = -1.5

Simplifying
y = -1.5

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