15=y+9

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Solution for 15=y+9 equation:


Simplifying
15 = y + 9

Reorder the terms:
15 = 9 + y

Solving
15 = 9 + 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 = 9 + y + -1y

Combine like terms: y + -1y = 0
15 + -1y = 9 + 0
15 + -1y = 9

Add '-15' to each side of the equation.
15 + -15 + -1y = 9 + -15

Combine like terms: 15 + -15 = 0
0 + -1y = 9 + -15
-1y = 9 + -15

Combine like terms: 9 + -15 = -6
-1y = -6

Divide each side by '-1'.
y = 6

Simplifying
y = 6

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