Question

3x-y=0
-4x +y=-2

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

3x-5y=-14
-x-8y=-2

x+7y=-2
-x-4y=-1

Answer 1

Boa noite

 3x - y = 0
-4x +y = -2
-x = -2
x = 2
6 - y = 0
y = 6 


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

3x - 5y =-14,
-x -  8y =-2

-3x - 24y = -6
-29y = -20
y = 20/29 
x = 2 - 8y = 2 - 160/29 = -102/29

x + 7y = -2
-x - 4y =-1

3y = -3
y = -1
x - 7 =-2
x = 5