Question

find a and b if ax + y - b = 0 has solution of x=2 , y = 7 and x = 1 , y = -3​

Answer 1

Answer:

a = -10 and b = -13

Step-by-step explanation:

Given that, ax+y-b=0   .  For (x,y)= (2,7)and (1,3).

So, 2a +7 - b = 0 -----------------(1)

      a - 3 - b = 0 => a = b + 3 --------------(2)

put (2) in (1) , we get

    2b +6 +7 - b = 0

=>  b = -13.

And a = b + 3 = -10.