3+y=15

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Solution for 3+y=15 equation: 


Simplifying
3 + y = 15

Solving
3 + y = 15

Solving for variable 'y'.

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

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

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

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

Simplifying
y = 12

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