-10y=20-9y

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Solution for -10y=20-9y equation: 


Simplifying
-10y = 20 + -9y

Solving
-10y = 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.
-10y + 9y = 20 + -9y + 9y

Combine like terms: -10y + 9y = -1y
-1y = 20 + -9y + 9y

Combine like terms: -9y + 9y = 0
-1y = 20 + 0
-1y = 20

Divide each side by '-1'.
y = -20

Simplifying
y = -20

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