Răspunsuri

2014-03-30T21:55:37+03:00

3(x-y)=180

x=y/3   ⇒y=3x

din cele 2 ecuatii obtinem:

3(x-3x)=180

-2x=60  ⇒ x=-30

Inlocuim in y=3x   ⇒y=3.(-30)=-90

y=-90

deci x=-30    si y= -90

2014-03-31T07:50:06+03:00
180:3=60 dif. reala
|---|---|---| nra
|---|          nrb    60:2=30 un sg.   deci    60x3=180 nr.a si  60x1=60 nr b