Question

find k if x=3 y=2 is a solution of 4x+(k-1)y=16 draw the graph of 3x+4y=11

Answer 1

4x+(k-1)y = 16
if x=3
y=2
then

4.3+(k-1).2=16
12+2k-2=16
2k=16+2-12
2k=6
k=3

then the answer is point P ( 4.2 , -0.6 )