Răspuns :
5m+3g=19
2m+4g=16, m+2g=8, m=8-2g
5(8-2g)+3g=19
40-10g+3g=19
7g=40-19
7g=21
g=3 lei, m=8-2x3=2 lei
2+3=5 lei
100:5=20 caiete
2m+4g=16, m+2g=8, m=8-2g
5(8-2g)+3g=19
40-10g+3g=19
7g=40-19
7g=21
g=3 lei, m=8-2x3=2 lei
2+3=5 lei
100:5=20 caiete
5m+3g=19/•2
2m+4g=16/•5
10m+6g=38
10m+20g=80
10m=38-6g
38-6g+20g=80
14g=42
g=3
m=2