3y+9=12-4y

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


Simplifying
3y + 9 = 12 + -4y

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

Solving
9 + 3y = 12 + -4y

Solving for variable 'y'.

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

Add '4y' to each side of the equation.
9 + 3y + 4y = 12 + -4y + 4y

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

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

Divide each side by '7'.
y = 0.4285714286

Simplifying
y = 0.4285714286

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