Question

1/3+1/4 using simplest form

Answer 1

Well
1/3-1/4=1/12
so 1/3=1/12+1/4=1/12+3/12=4/12
and 1/4=-(1/12-1/3)=-1/12+1/3=-1/12+4/12=3/12
4/12+3/12=7/12