Question

Find two solutions for 4x-5y=15, check whether (2,-2) is a solution or not

Answer 1

1   4*2-5*2=15
     8-10=15 

2   2

Answer 2

4x-5y=15
y=-15+4x/5
1) If x=0
y=-15+4(0)/5
=-15/5
=-3
2) If x=5
y=-15+4(5)/5
= -15+20/5
= 5/5
= 1

4x-5 y=15
4(2)-5(-2) = 8+10
= 18

(2,-2) is not a solution of 4x-5y=15