Question

1.Rezolvati prin metoda substitutiei urmatoarele sisteme de ecuatii:

Answer 1

Răspuns:

1.)

y=-13+3×

-×+5y=-9

-×+5(-13+3×)=-9

×=4

2.)

y=-11-6×

x+4y=-21

×+4(-11-6×)=-21

×=-1

y=-11-6×(-1)

y=-5

(×,y)=(-1,-5)