Question

EX2. AFLATI A SI B:
DACA A+B=10 SI A-B=2
DACA A+B=20 SI A-B=0
DACA A+B=36 SI A-B=12

Answer 1

1) a+b=10
a=10-b
a-b=2
a=b+2
10-b=b+2
10-2=b+b
8=2B
B=4
A=6

2) a+b=20
A-b=0
=>a=b
=>a=10
b=10

3)a+b=36
a-b=12
a=36-b
a=12+b
36-b=12+b
36-12=b+b
24=2b
b=12
a=24