Răspunsuri

2014-11-19T00:52:38+02:00
A + b = 12
3a + 2b = a + b + 29
2(a + b) + a = a + b + 29
2 * 12 + a = 12 + 29
a = 41 - 24
a = 17
b = 12 - 17
b = - 5 
2014-11-19T01:14:40+02:00
A+b=12 iar 2(a+b)=2*12 
2a+2b=24
a*3+b*2=12+29
a*3+b*2=41 
a*3+b*2-a*2-b*2=41-24
a=17
17+b=12
b=12-17
b=-5