Răspuns :
40/100 · 85=x
2·85/5=x
2·17=x
x=34
20/100 · x=80
x/5=80
x=5·80
x=400
x/100·300=225
3x=225
x=225:3
x=75
Succes!
Răspuns:
40%×85=x
40/100 × 85 =x
simplifici si da
2×17=x
34=x
20% × x=80
20/100 × x=80
simplifici
x/5=80
le inmultesti in diagonală
80×5=x
400=x
x% × 300=225
x/100 × 300=225
3x=225
x=225/3
x=75