Question

{3×+4×=-5
{×-2×=5

{×+3×=6
{-4×+6y=-12

{-×=-1-Y
{×-y=0

Answer 1

3x + 4x = - 5
x - 2x = 5 ( -2)

3x + 4x= -5
2x - 4x = 10
-------------------
5x = 5
x= 1


x + 3x = 6 ( -2)
-4x+6y= 12
----------------------
-2x - 6y = -12
- 4x +6y= 12
---------------------
-6x = 0
x= 0
- 4x +6y=12
-4.0 + 6y=12
0 + 6y= 12
y=12/6
y=2

- x= 1 - y
x + y=0

- x + y =1
x - y = 0
----------------
0
x=0
y=0