Question

a+b+c=309km a parcurge cu 36km.<b a parcurge cu 12 km.< c .Câți km. parcurge fiecare?

Answer 1

A+B+C=309km
A=B - 36km
A=C - 12km
B - 36km=C - 12km
B=-12+36+C
B=24+C

C - 12km + 24+C +C = 309
3C=309-12
3C=297
C=99
B=24+99
B=123
A=309-99-123
A=87

Verificare:
A=B - 36km=123-36=87
A=C - 12km=99-12=87