Question

can any one help me out with this sum ? can anyone please help me?

Answer 1

Sorry for the delay
I ws confused

Answer 2

Sol :
Given pair of equations 2x + 3y = 7 and 2αx + (α + β )y = 28

If pair of equations have infinite many solutions then a1 / a2 = b1 / b2 = c1 / c2 .

a1 = 2  a2 = 2α ,  b1 = 3 ,b2 = (α + β ) ,c1 = 7 ,c2 = 28

1 / α = 3 / (α + β ) = 7 / 28

1 / α = 7 / 28  ⇒ α = 4 

α  = 4 ---------(1) 

and 3 / (α + β ) = 7 / 28

  (α + β ) = 12 ---------(2)

from Equations (1) and (2) we get β = 8.