Solve for x
x = \frac{480}{13} = 36\frac{12}{13} \approx 36.923076923
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8x-80+5x=400
Add 5x to both sides.
13x-80=400
Combine 8x and 5x to get 13x.
13x=400+80
Add 80 to both sides.
13x=480
Add 400 and 80 to get 480.
x=\frac{480}{13}
Divide both sides by 13.
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