Question

2x+3y=14 -x+5y=-7 cancelamento

Answer 1

{2x+3y=14
{-x+5y=-7
-x+5y=-7 × (2)
{2x+3y=14
{-2x+10y=-14
13y=0
y=0/13
y=0
2x+3y=14
2x+3.0=14
2x+0=14
2x=14
x=14/2
x=7
S={(7, 0)}

Answer 2

 2x+3y=14 -x+5y= - 7(2)
  2x+3y=14 -2x+10y= - 14            13y = 0 ==> y = 0

2x + 3y = 14
2x = 14 - 3.0
2x = 14 - 0
2x = 14
x = 7

V = {( 7 , 0  )}