The first terms of airthmetic sequence are shown below 20,17,14,11,8

answer:

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:

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

answer is x<