Question

Please solve Q4 (b) part

Answer 1

2x/5+3y/10=3
2x/5=3-3y/10
Let y=0
2x/5=3-3*0/10
2x/5=3-0
2x=3*5=15,x=15/2=7.5
Let y =1
2x/5=3-3*1/10
2x=3-3/10*5
2x=3-3/2
X=3-3/2*2
X=0
Let y=-1
2x/5=3-3*-1/10
2x=3-3*-1/10*5
2x=3+3/2
x=6
Let y =2
2x/5=3-3*2/10
2x/5=3-6/10
2x=-3/10*5
x=-3/4=0.75
So solution are
(0,1) ,(6,-1) ,(0.75,2)