Hello world can you help me with math?

Im going to have to say C

Step-by-step explanation:

I hope this helps you out!

x/7.50 = 15

x= 7.50 / 15 divide

step-by-step explanation:

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: