|
traditional method
1. if x^2+xy+1=16 and x-y=1 then x+y=?
answer: 5 or -6
2. if x+y=4, y+z=8 and z+x=6; then 2y-z-x=?
answer: 0
3. if 5/x=3 and y/6=2 then (3+y)/(x+5)=?
answer: 9/4
these are solved by traditionally. is there other method to solve these?
|