Question

How can i do this one ☝️

Answer 1

Answer:

$\circ\circ\circ\fbox{\fbox{\fbox{\underline{\underline{\Huge{\texttt{r = 20}}}}}}}\circ\circ\circ$

Step-by-step explanation:

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.

Answer 2

heya ..... first take L. c. m.. hope it helps you.....