Răspuns :
1. 3427 - B = 1437
B = 3427 - 1437
B = 1990
1990 - 1215 = 775 ESTE DIFERENTA
2. A + B + C = 3600
1120 + 1130 + 1140 = 3390
3390 + 3600 = 6990
A + B + C = 6990
3. A + B + C = 8551
A = B + 1266
C = A - 2055⇒C = B + 1266 -2055
B + 1266 + B + B + 1266 - 2055 = 8551
3B = 8551 + 2055 - 2532
3B = 8074
B = 8074/3
B = 3427 - 1437
B = 1990
1990 - 1215 = 775 ESTE DIFERENTA
2. A + B + C = 3600
1120 + 1130 + 1140 = 3390
3390 + 3600 = 6990
A + B + C = 6990
3. A + B + C = 8551
A = B + 1266
C = A - 2055⇒C = B + 1266 -2055
B + 1266 + B + B + 1266 - 2055 = 8551
3B = 8551 + 2055 - 2532
3B = 8074
B = 8074/3
1) a-b= 1437⇒ a=1437+b
a=3427
⇒ 3427= 1437+b
b= 3427-1437
b= 1990
b- 1215= 1990-1215= 775
2)a+b+c= 3600
1120+1130+1140+3n= 3600
3390+3n=3600
3n=3600-3390
n= 210 : 3
n= 70 (nr care trebuie adaugat)
a=1120 + 70
a= 1190
b= 1130+70
b= 1200
c= 1140+70
c= 1210.
3) a+b+c= 8 551
a= 1 266+b
a= c+ 2055⇒c= a- 2055 = 1266+b-2055
1 266+b+b+1266+b-2055= 8551
3b= 8551-1226-1226+2055
3b=8154
b= 8154:3
b= 2718.
a= 2718+1266
a= 3 984
c= 3984-2055
c= 1929
a=3427
⇒ 3427= 1437+b
b= 3427-1437
b= 1990
b- 1215= 1990-1215= 775
2)a+b+c= 3600
1120+1130+1140+3n= 3600
3390+3n=3600
3n=3600-3390
n= 210 : 3
n= 70 (nr care trebuie adaugat)
a=1120 + 70
a= 1190
b= 1130+70
b= 1200
c= 1140+70
c= 1210.
3) a+b+c= 8 551
a= 1 266+b
a= c+ 2055⇒c= a- 2055 = 1266+b-2055
1 266+b+b+1266+b-2055= 8551
3b= 8551-1226-1226+2055
3b=8154
b= 8154:3
b= 2718.
a= 2718+1266
a= 3 984
c= 3984-2055
c= 1929