F(x) = 3x + 2; {1,2,3}

1= 5

2= 8

3= 11

Step-by-step explanation:

Substitute the given value into the function and evaluate.

As u can tell u are adding three to your solution every time, so if it 4 it would then be 14.

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: