Question

find the value of k for which the system of equation is 2 x + Y - 3 is equal to zero and 5 x + K Y + 7 is equals to zero​

Answer 1

Answer:

use cross multiplication solve it it's so easy

Answer 2

The condition for no solution is...

a1/a2 = b1/b2 not equals to c1/c2,

so,

a1 = 1 , a2= 5 , b1= 2 , b2 = k

1/5 = 2/k,  

now,

k = 10 (cross multiplication)

Hope it helps