Question

y= 7r + 4 , solve r , if y = 32 ? show your work

Answer 1

First, plug 32 in the place of y, you get:
\[32=7r+4 ... (1)\]

Answer 2

Can you rewrite your equation with r in terms of y? Then just plug in the y value you are given.

Answer 3

Now, you should try to isolate r in one side.

Answer 4

So to get rid of the 4, subtract 4 from both sides, you get:
\[32-4=7r+4-4 \implies 28=7r\]

Answer 5

Now, divide both sides by 7, you get:
\[{28 \over 7}={7r \over 7} \implies 4=r\]
So r is equal to 4.