Question

daca 2a+b egal 850 si a+begal 650, aflati a si b.

Answer 1

a=650-b
2·(650-b) +b = 850 
1300- 2b+ b=850
-b=850-1300 
-b= -450
b=450⇒ a+450=650
a=650-450
a=200 ⇒ nr sunt a=200 si b=450
Verificare : 2 · 200 + 450 =850 A(adevarat)
400 + 450 = 850
si 200 +450 =650 A(adevarat)
Sper ca te-am ajutat

Answer 2

2a+b=850==========>>>>a=850-650
a+b=650
Cat   e a ?
850-650=200a
  Cat e b ?
a+b=650 =====>>  b=650-200   
                                b=450
SPER CA TE-AM AJUTAT :*
VERIICARE:2*200+450=400+450=850