Question

the numerator of a fraction is 4 less than the denominator, if 1 is added to both .nr and Dr the fraction become 1/2 find the fraction
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Answer 1

Answer:

let numerator be x

denominator is x+4

when we add 1 then numerator becomes x+1

denominator becomes x+4+1=x+5

now x+5=2(x+1)

x+5=2x+2

x-2x=2-5

-x=-3

x=3

numerator is 3

denominator is 3+4=7