Question

How do you solve `15+ r = 71`?

Answer 1

`r = 56`

Explanation:

First, what you want to do is get the numbers and variable
(the letter `r`) on opposite sides of the equation.

Subtract 15 from both sides of the equation to get `r` by itself like this:

`15 +r = 71`
`-15` `color(aaaaaaaaaaaaaaaa)` `-15`

On the left side of the equation you are just left with `r` because `15-15 = 0`, and on the right side you end up with 56 because `71-15 =56`.

Therefore,
`r=56`