3y+y=9-y

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


Simplifying
3y + y = 9 + -1y

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

Solving
4y = 9 + -1y

Solving for variable 'y'.

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

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

Combine like terms: 4y + y = 5y
5y = 9 + -1y + y

Combine like terms: -1y + y = 0
5y = 9 + 0
5y = 9

Divide each side by '5'.
y = 1.8

Simplifying
y = 1.8

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