math
posted by
jacob on
.
x+x+5+2x+1

math 
jacob,
a+2a+103a

math 
Jill,
2x+5+2x+1
4x+5+1
4x+6 or 6+4x
I'm pretty sure that's right.

math 
PsyDAG,
For the second problem, combine like terms. The a's cancel each other out (3a  3a = 0) leaving you with 10.
Jill is right.