Question

Pls help me with my homework

Answer 1

Hello! I believe your answer is r = 8.
Here's how I got it : 
                                  42 - 5r = 2
                                  42-42 - 5r = 2-42 , we subtract 42 to move it over to the right to isolate the 5r. And now we evaluate it!
                                 -5r = -40
                                 -5r/-5 = -40/-5         divide by -5 to isolate the r
that leaves us with :  r = 8     

Answer 2

42-5r=2

You need to isolate the r.  First, subtract 42 from both sides:
42-42-5r=2-42
-5r=-40

Now divide both sides by -5:
-5r/-5=-40/-5
r=8

So your final answer is r=8

Hope that helps