Question

Rezolvati in RxR prin metoda reducerii sistemul de ecuatii:
a) \left \{ {{2x-3y=5} \atop {x+y=10}} \right.
b) \left \{ {{x-y=-1} \atop {3x+2y=7}} \right.

Answer 1

a) 2x-3y=5

x+y=10 inmultit cu 3

3x+3y=30

5x+35

x=7

y=10-7=3

b)x-y=-1 inmultit cu 2

3x+2y=7

2x-2y=-2

5x=5

x=1

y=2

Sper ca te-am ajutat.Coroana?:)