algebra
posted by C .
I am having trouble figuring this out.
ADD
(r  6s + 3) + (7r + 5s) + (s+5)

Clear the parentheses.
r6s+3+7r+5s+s+5=??
combine like terms. 
I rewrite it according to terms.
r+7r= 8r which is like saying 1+7=8 (then add back the variable)
Same applies to the following:
6s+5s+s=0 which is like saying 6+5+1=0
3+0+5= 8
So you would end up with: 8r+8