Question

if 2x-3y=7 and (a+b) x-(a-b-3)y=4a+b then find the relation between a and b such that the give equation represent a coincident line​

Answer 1

Answer:

Step-by-step explanation:

2÷(a+b)=3÷(a-b-3)=7÷(4a+b)

=>2a-2b-6=3a+3b & 12a+3b=7a-7b-21

=>2a+5b=-6 & 5a+10b=-21

=>4a+10b=-12 & 5a+10b=-21

Solving both equations by elimination method,

We get,

4a-5a=-12+21

=>-a=9

=>a=-9(Ans)