1.

find the value of k for which the pair of linear equation 2 X + 3 Y equal to 7 and 4 x + a y equal to 14​

Answer»

Answer:

consider equation (1)

2X + 3y = 7

MULTIPLE whole equation with 2

( 2x + 3y = 7 ) * 2

==> 4x + 6Y = 14

now

4x + ay = 14 ............ (1)

4x + 6y = 14 ............(2)

substracting (2) with (1)

we get

ay - 6y = 0

==> ay = 6y

y on both sides get cancel

==> a = 6



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