Calculation: 10 / X - (10 / 2.5x) = 1.5

Calculation: 10 / X - (10 / 2.5x) = 1.5

10/x-(10/2.5x)=1.5
10/x-4/x=1.5
6/x=1.5
x=6÷1.5
x=4
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