Question

Find the value of k ,if (-2,3) is a solution of the linear equation 7x + 8y = 2k + 1 and hence find two solution

Answer 1

first we put x=-2
7x+8y=2k+1
7×-2+8×-2-1=2k
-14-16-1=2k
-31=2k
k=-31/2
k=-15.5

for second solution we use same method and put 3