Răspunsuri

2014-11-06T12:05:53+02:00
A=caiete
b=creioane
4a+6b=26
2a+b=11
a+b=?
2a+b=11 2a=11-ba= \frac{11-b}{2}
4a+6b=26 4* \frac{11-b}{2} +6b=262* (11-b) +6b=2622-2b +6b=264b=26-224b=4b= \frac{4}{4} =1
a= \frac{11-b}{2} a= \frac{11-1}{2} a= \frac{10}{2} =5
a+b=5+1=6
1caiet + 1creion = 6 lei