9y-18=30-3y

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Solution for 9y-18=30-3y equation:


Simplifying
9y + -18 = 30 + -3y

Reorder the terms:
-18 + 9y = 30 + -3y

Solving
-18 + 9y = 30 + -3y

Solving for variable 'y'.

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

Add '3y' to each side of the equation.
-18 + 9y + 3y = 30 + -3y + 3y

Combine like terms: 9y + 3y = 12y
-18 + 12y = 30 + -3y + 3y

Combine like terms: -3y + 3y = 0
-18 + 12y = 30 + 0
-18 + 12y = 30

Add '18' to each side of the equation.
-18 + 18 + 12y = 30 + 18

Combine like terms: -18 + 18 = 0
0 + 12y = 30 + 18
12y = 30 + 18

Combine like terms: 30 + 18 = 48
12y = 48

Divide each side by '12'.
y = 4

Simplifying
y = 4

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