Question

How do you solve the equation `abs(1-1/5x)=3`?

Answer 1

`x in {20, -10}`

Explanation:

`1 - x/5 = ± 3`

Add `-1`, after that multiply by `-5`.

`- x/5 = -1 ± 3`

`x/5 = +1 ± 3`

`x = 5 ± 15`