Question

caciula + manusi =42 lei, caciula+fular =54lei, fular+manusi=40 lei, cat costa caciula? cat costa fularul? cat costa manusile?

Answer 1

c=căciulă
m=manusi
f=fular

c + m =42 lei
f + m =40 lei
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c+f + 2m=42+40

》inlocuim..... 54 +2m=82
2m=82-54
2m=28
m=28:2
m=14 lei

c+m=42 》c+14=42 》c=42-14 》c=28 lei
f+m=40 》f+14=40 》f=40-14 》f=26 lei