Does anyone know how the repeating decimal symbol (line above a decimal) looks on a calculator? I can’t find it

I don't think there is a repeating sign, at least on the  calculator I use, you may just have to write the number out.

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: