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

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


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

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

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

Combine like terms: 4y + -3y = 1y
-9 + 4y = 12 + 1y

Solving
-9 + 4y = 12 + 1y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
-9 + 4y + -1y = 12 + 1y + -1y

Combine like terms: 4y + -1y = 3y
-9 + 3y = 12 + 1y + -1y

Combine like terms: 1y + -1y = 0
-9 + 3y = 12 + 0
-9 + 3y = 12

Add '9' to each side of the equation.
-9 + 9 + 3y = 12 + 9

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

Combine like terms: 12 + 9 = 21
3y = 21

Divide each side by '3'.
y = 7

Simplifying
y = 7

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