15=5y+20

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Solution for 15=5y+20 equation: 


Simplifying
15 = 5y + 20

Reorder the terms:
15 = 20 + 5y

Solving
15 = 20 + 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.
15 + -5y = 20 + 5y + -5y

Combine like terms: 5y + -5y = 0
15 + -5y = 20 + 0
15 + -5y = 20

Add '-15' to each side of the equation.
15 + -15 + -5y = 20 + -15

Combine like terms: 15 + -15 = 0
0 + -5y = 20 + -15
-5y = 20 + -15

Combine like terms: 20 + -15 = 5
-5y = 5

Divide each side by '-5'.
y = -1

Simplifying
y = -1

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