S+S=2S

Work out the above equation when S=Sleepover…………….Double sleepover!

Samuel and Jin Seok are both coming round tomorrow night. The only thing to ruin it is the algebra test we have last period. As simple as it looks, I just cannot get the hang of complex simplification! I can do stuff like a+a+a+a, but on stuff like 6(a+2y)-7(2x-3y), even though I know the theory, I always go wrong somewhere. It is so annoying!