Question

How can i do this one ☝️

Answer 1

20

Explanation:

-4 =
`(r)/(20)` - 5

⇒ -4 + 5 =
`(r)/(20)`

⇒ 1 =
`(r)/(20)`

⇒ 1 × 20 = r

⇒ 20 = r

Answer 2

Hey there!

Let's start by adding 5 to both sides. This eliminates the -5.

1 = r/20

Now to solve for r we can multiply both sides by 20.

20 = r

Check

-4 = 20/20 - 5

-4 = 1 - 5

-4 = -4

Your answer is r = 20.

Hope this helps!