Question

a+b=5199..a-b=109...a=?b=?

Answer 1

a=109+b
109+2b=5199 =>2b=5090=>b=2545
a=109+2545=>a=2654

Answer 2

a+b = 5199
a-b = 109
   ⇒ a = 109+b
inlocuim in prima ecuatie si aflam pe b
109+b+b=5199
109+2b=5199
2b=5199-109
2b=5090
b=5090/2
b=2545

a-b =109
a-2545=109
a=109+2545
a=2654
Verificare
2654+2545 = 5199