Solve for n
n = \frac{239}{2} = 119\frac{1}{2} = 119.5
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n+n+1=120\times 2
Multiply both sides by 2.
2n+1=120\times 2
Combine n and n to get 2n.
2n+1=240
Multiply 120 and 2 to get 240.
2n=240-1
Subtract 1 from both sides.
2n=239
Subtract 1 from 240 to get 239.
n=\frac{239}{2}
Divide both sides by 2.
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