6y-9y=21

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Solution for 6y-9y=21 equation: 


Simplifying
6y + -9y = 21

Combine like terms: 6y + -9y = -3y
-3y = 21

Solving
-3y = 21

Solving for variable 'y'.

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

Divide each side by '-3'.
y = -7

Simplifying
y = -7

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