12+3=2y

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Solution for 12+3=2y equation:


Simplifying
12 + 3 = 2y

Combine like terms: 12 + 3 = 15
15 = 2y

Solving
15 = 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
15 + -2y = 2y + -2y

Combine like terms: 2y + -2y = 0
15 + -2y = 0

Add '-15' to each side of the equation.
15 + -15 + -2y = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -2y = 0 + -15
-2y = 0 + -15

Combine like terms: 0 + -15 = -15
-2y = -15

Divide each side by '-2'.
y = 7.5

Simplifying
y = 7.5

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