Solve for x
x=120
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20x+15x+12x=5640
Multiply both sides of the equation by 60, the least common multiple of 3,4,5.
35x+12x=5640
Combine 20x and 15x to get 35x.
47x=5640
Combine 35x and 12x to get 47x.
x=\frac{5640}{47}
Divide both sides by 47.
x=120
Divide 5640 by 47 to get 120.
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