Question

Kx+2y=5
3x+y=1
find k vaule​

Answer 1

Answer:

we can do it by assumption.

(I) 3x+ y = 1

(ii) Kx+2y=5

let x= 1 ( independent variable) , then y(dependent variable)=

3*1 + y= 1

y=1-3

= -2

now , we will put the values in (ii);

K*1+2*-2= 5

K*1+(-4)=5

K-4=5

K=5-(-4)

=5+4

=9

cross check

Kx+ 2y = 5

LHS. = RHS

LHS= K*1+2*y

= 9*1+2*-2

=9+(-4)

=5

RHS = 5

5=5

LHS = RHS