Datele4 problemeI;a+b+c+d+e+f=1433
b=a+2, c+d=360, c=d/5, e-f=321, f=e/4
Rezolvare
c+d=360 si c=d/5, inlocuim in prima relatie
d/5+d=360 aducem la acelasi numitor
(d+5d)/5=360
6d/5=360
d=360·5/6 siplificam=60·5=300
d=300
c=d/5=300/5=60
c=60
e-f=321 si f=e/4 inlocuim
e-e/4=321 aducem la acelasi numitor
(4e-e)/4=321
3e/4=321
e=321·4/3 simplificam
e=107·4=428
e=428
f=e/4=428/4
f=107
a+b+c+d+e+f=1433 inlocuim cu datele cunoscute
a+a+2+60+300+428+107=1433
2a+895=1433
2a=1433-897
2a=536
a=536/2
a=268
b=a+2=268+2
b=270
verificare
268+270+60+300+428+107=1433