Solve for n
n = \frac{170}{3} = 56\frac{2}{3} \approx 56.666666667
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3n-10+20=180
Combine 2n and n to get 3n.
3n+10=180
Add -10 and 20 to get 10.
3n=180-10
Subtract 10 from both sides.
3n=170
Subtract 10 from 180 to get 170.
n=\frac{170}{3}
Divide both sides by 3.
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