Question

solve graphically this question

Answer 1

x+2y=5
if x=1
then y=5-1/2=4/2=2
if x=3
then y=5-3/2=2/2=1
if x=7
then y=5-7/2=-2/2=-1
3x+6y=15
this equation can divide by3
then equation become x+2y=15