4y-9=12-3y

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Solution for 4y-9=12-3y equation:


Simplifying
4y + -9 = 12 + -3y

Reorder the terms:
-9 + 4y = 12 + -3y

Solving
-9 + 4y = 12 + -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.
-9 + 4y + 3y = 12 + -3y + 3y

Combine like terms: 4y + 3y = 7y
-9 + 7y = 12 + -3y + 3y

Combine like terms: -3y + 3y = 0
-9 + 7y = 12 + 0
-9 + 7y = 12

Add '9' to each side of the equation.
-9 + 9 + 7y = 12 + 9

Combine like terms: -9 + 9 = 0
0 + 7y = 12 + 9
7y = 12 + 9

Combine like terms: 12 + 9 = 21
7y = 21

Divide each side by '7'.
y = 3

Simplifying
y = 3

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