Răspuns:
Răspuns: Rezolvare(ex 1)
1.Ce suma a avut gospodina la ea?
(20.000×4):2×3=>80.000:2×3=40.000×3=120.000(lei a avut gospodina)
2.Cat a costat kg de rosii?
[(4×20.000):2]:2=>40.000 lei:2=20.000 (lei un kg de rosii)
3.Dar cel de mere cat costa?
3×20.000:4=60.000:4=>15.000(lei 1 kg de mere)
Ex 2
{[(9×x+42]:x-104}=5
80:{[9×x+42]:x-104}=5
[(9×x+42):4]×4-104=80:5=>16
[{(9×x+42):4]×4=16+104=>120
(9×x+42):4=120:4=>30
9×x+42=4×30=>120
9×x=120-42=>78
x=78:9=>8,(6)