what number should be added to 7/2 of4/5 so that sum would be 18
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4/5 (7/2+x)=18
18*4/5=22.5
x = 22.5-3.5 = 19
x = 19
18*4/5=22.5
x = 22.5-3.5 = 19
x = 19
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