Question

2×+2y=8,20
3×+y=9,10

(A)×=6,50 e y =2,40
(B)×=3,20 e y =0,90
(C)×=2,80 e y =1,10
(D)×=2,50 e y =1,60

Answer 1

d) pois;
2.(2,50)+2.(1,60)=8,20
3.(2,50)+1,60=9,10