If    f(n) =  n  +  (1/3), find  f(7/8).  leave your answer as a fraction

If I'm understanding this question all you need to do is substitute 7/8 for f and solve for n.

so to get n by itself you just need to subtract 1/3 from 7/8, which comes out to 13/24

I hope this was helpful.

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: