Question

Sistema LINEAR
X+2y=5
2x-y+3y=9
3x+3y-2y=3

X+2y=5

Answer 1

Resposta:

{x-2y=3}

{2x-3y= 5}

x=3 + 2y 

2x-3y= 5

2.(3+2y) - 3Y = 5

6 + 4y - 3y = 5

4y - 3y = 5 - 6

y=-1

x-2y=3

x -2. (-1) = 3

x + 2 = 3

x=3-2

x=1.

S={1,-1}