Question

If A+B=40% and A-B=60% then2A-3B÷(A+B)=? Solution

Answer 1

now A+B=40%
and A-B=60%
adding these equations we have 2A=100%
A=50%
subtracting we have 2B=-20%==>B=-10%
thus 2A-3B=100%+30%=130%
thus 2A-3B÷(A+B)=130%/40%=13/4=3.25