Question

find the value of k if (3, - 4 )is solution of 5 x + k y = 7.

Answer 1

$\huge{hey\:mate}$
$<b><i>$
Here is your answer > >

5x+ky=7

x=3 and y=-4

Putting the values of x and y

5 (3)+k (-4)=7

15-4k=7

15-7=4k

8=4k

k=8/4

k=2

Hope it helps!

Thankyou ☆ ☆

Answer 2

so put X= 3 and y= -4 in the given equation
so 5×3+k×-4=7
15-4k=7
4k=15-7
4k=8
k=2