Question

1)Afla valorile literelor stiind ca a+b+c=7644 2)a+b=4987 3)b+c=5206

Answer 1

a+b+c = 7644
a+b = 4987
Inlocuim a+b din prima relatie cu 4987 si obtinem:
4987+c = 7644
c = 7644-4987
c = 2657
Dar stim ca b+c = 5206, adica b+2657=5206, atunci:
b = 5206-2657
b = 2549
Stim ca a+b=4987, adica a+2549 = 4987, atunci
a = 4987-2549
a = 2438

Answer 2

a+b+c =7644
a+b=4987 c=7644-4987=2657
b+c=5206 a=7644-5206=2438
a+b=4987
2438+b=4987
b=4987-2438
b=2549
V:2549+2438=4987
2549+2657=5206
2438+2549+2657=7644
R:a=2438,b=2549,c=2657