principal: 2000 $, annual interest: 7%, interest periods: 4 , number of years: 19

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:

20

step-by-step explanation:

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9