y-4y=9+6

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Solution for y-4y=9+6 equation: 


Simplifying
y + -4y = 9 + 6

Combine like terms: y + -4y = -3y
-3y = 9 + 6

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

Solving
-3y = 15

Solving for variable 'y'.

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

Divide each side by '-3'.
y = -5

Simplifying
y = -5

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