15-y=42

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Solution for 15-y=42 equation: 


Simplifying
15 + -1y = 42

Solving
15 + -1y = 42

Solving for variable 'y'.

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

Add '-15' to each side of the equation.
15 + -15 + -1y = 42 + -15

Combine like terms: 15 + -15 = 0
0 + -1y = 42 + -15
-1y = 42 + -15

Combine like terms: 42 + -15 = 27
-1y = 27

Divide each side by '-1'.
y = -27

Simplifying
y = -27

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