9-4y=15-y

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Solution for 9-4y=15-y equation:


Simplifying
9 + -4y = 15 + -1y

Solving
9 + -4y = 15 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
9 + -4y + y = 15 + -1y + y

Combine like terms: -4y + y = -3y
9 + -3y = 15 + -1y + y

Combine like terms: -1y + y = 0
9 + -3y = 15 + 0
9 + -3y = 15

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

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

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

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

Simplifying
y = -2

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