Question

Solve for r.
18r - 10r - 20r + 2r + 9r = 18
r =
Submit

Answer 1

Answer: -18

Explanation:

18r - 10r - 20r + 2r + 9r = 18

-r = 18

18/-1

r = -18

Answer 2

`r=-18`

Explanation:

1) Combine like terms

`18r-10r-20r+2r+9r=18\\-r=18`

2) Divide both sides of the equation by the same term

`-r=18\\(-r)/(-1) =(18)/(-1)`

3) Simplify

a. Cancel terms that are in both the numerator and denominator

`(-r)/(-1) =(18)/(-1) \\r=(18)/(-1)`

b. Divide the numbers

`r=-18`