15=3y+9

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Solution for 15=3y+9 equation:


Simplifying
15 = 3y + 9

Reorder the terms:
15 = 9 + 3y

Solving
15 = 9 + 3y

Solving for variable 'y'.

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

Add '-3y' to each side of the equation.
15 + -3y = 9 + 3y + -3y

Combine like terms: 3y + -3y = 0
15 + -3y = 9 + 0
15 + -3y = 9

Add '-15' to each side of the equation.
15 + -15 + -3y = 9 + -15

Combine like terms: 15 + -15 = 0
0 + -3y = 9 + -15
-3y = 9 + -15

Combine like terms: 9 + -15 = -6
-3y = -6

Divide each side by '-3'.
y = 2

Simplifying
y = 2

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