3y-9+6y=18

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Solution for 3y-9+6y=18 equation: 


Simplifying
3y + -9 + 6y = 18

Reorder the terms:
-9 + 3y + 6y = 18

Combine like terms: 3y + 6y = 9y
-9 + 9y = 18

Solving
-9 + 9y = 18

Solving for variable 'y'.

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

Add '9' to each side of the equation.
-9 + 9 + 9y = 18 + 9

Combine like terms: -9 + 9 = 0
0 + 9y = 18 + 9
9y = 18 + 9

Combine like terms: 18 + 9 = 27
9y = 27

Divide each side by '9'.
y = 3

Simplifying
y = 3

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