Melanie read 45 of 100 page book her sister read 1 half of 10 page book how read a grater fraction of her book melanie or her sister

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:

(-5,-28)

i graphed to on desmos.