-12.1=12.9-5y

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Solution for -12.1=12.9-5y equation: 


Simplifying
-12.1 = 12.9 + -5y

Solving
-12.1 = 12.9 + -5y

Solving for variable 'y'.

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

Add '5y' to each side of the equation.
-12.1 + 5y = 12.9 + -5y + 5y

Combine like terms: -5y + 5y = 0
-12.1 + 5y = 12.9 + 0
-12.1 + 5y = 12.9

Add '12.1' to each side of the equation.
-12.1 + 12.1 + 5y = 12.9 + 12.1

Combine like terms: -12.1 + 12.1 = 0.0
0.0 + 5y = 12.9 + 12.1
5y = 12.9 + 12.1

Combine like terms: 12.9 + 12.1 = 25
5y = 25

Divide each side by '5'.
y = 5

Simplifying
y = 5

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