Question

If x = 1 and y = 2 is a solution of kx + 3y = 7, find the value k.

Answer 1

Answer:

k = 1

Step-by-step explanation:

x = 1

y = 2

substitute then in the given equation

k (1) + 3(2) = 7

k + 6 = 7

k = 7 - 6

k = 1

Answer 2

Answer:

x =1 y=2 so kx +3y = k×1+3×2=k+6=7 so 7-6=1,k=1