Solve for y
y=40
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2y+10y+5\left(\frac{y}{5}+y\right)=720
Multiply both sides of the equation by 10, the least common multiple of 5,2.
12y+5\left(\frac{y}{5}+y\right)=720
Combine 2y and 10y to get 12y.
12y+5\times \frac{6}{5}y=720
Combine \frac{y}{5} and y to get \frac{6}{5}y.
12y+6y=720
Cancel out 5 and 5.
18y=720
Combine 12y and 6y to get 18y.
y=\frac{720}{18}
Divide both sides by 18.
y=40
Divide 720 by 18 to get 40.
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