Question

Combine like terms
-5r-3r

Answer 1

since they both have the same variables you can take them off and add them to the end of the answer so -5-3 =-8 then you can add the r at the end which would make -8r

Answer 2

Combine like terms. Note that both have the same amount of variables

-5r - 3r = -8r

-8r is your answer

~La Pucelle