15=3+y

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Solution for 15=3+y equation:


Simplifying
15 = 3 + y

Solving
15 = 3 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
15 + -1y = 3 + y + -1y

Combine like terms: y + -1y = 0
15 + -1y = 3 + 0
15 + -1y = 3

Add '-15' to each side of the equation.
15 + -15 + -1y = 3 + -15

Combine like terms: 15 + -15 = 0
0 + -1y = 3 + -15
-1y = 3 + -15

Combine like terms: 3 + -15 = -12
-1y = -12

Divide each side by '-1'.
y = 12

Simplifying
y = 12

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