Question

If 1/3rd of a number is subtracted from 5/7th of the
same, answer so obtained is 64. What is the number

Answer 1

let the number be x.
so, 5x/7-x/3=64
=>15x-7x/21=64
=>8x/21=64
=>x=64×21/8
=>x=168
so the number is 168....
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