1+r/9=0 this is a 2 step equation how do you solve it?

So solve for r

try to isolate the placeholder

1+r/9=0

subtract 1 from both sides

r/9=-1

multiply both sides by 9 to clear fraction (because r/9 times 9/1=r/1 times 9/9=r)

r=-9

tada

1 + r = 0

9 1

1 + r = 0

- 1 - 1

r = - 1