Solve this 6r+7=13+7r

Let's move all to one side:

6r+7-13-7r=0

and re-arrange to have similar terms together:

6r-7r + 7-13=0

let's add up what we can:

-1r-6=0

we can move the - 6 to the other side and multiply both sides by - 1 and we get:

r=-6 This is the solution.

6r + 7 = 13 + 7r

- 6r - 6r

7 = 13 + r

- 13 - 13

-6 = r