Question

2 X + 3 Y is equal to 7 and 28 x + Y is equal to 28 minus b y find the value of A and B for which the following pair of equation has infinitely many solutions​

Answer 1

by hit and trial method put the values of x and find y.... then plot on graph. since this a unique solution you will get the value of x and y

Answer 2

Answer:

2X+3Y-7=0

2ax+(a+b)y-28=0

For a system to have infinitely many solutions  

A1/a2=b1/b2=c1/c2

So, 2/a=1/4

A=8

Now,3/8+b=1/4

So b=4

Therefore a=8

b=4

Step-by-step explanation: