Please dijawab ya Himpunan penyelesaian sistem persamaan 3 (x - 1) + 2 (y+1) = x + 3y dan 3x - (4y-1) = 2x-3y adalah {(x,y)}. Nilai 2x-y adalah terimakasih

3(x-1) + 2(y+1) = x+3y
3x - 3 + 2y + 2  = x+3y
3x+2y-1            = x+3y
2x-y                  = 1...........(1)
                         
3x - (4y-1)        = 2x-3y
3x-4y+1            = 2x-3y
x-y                    = -1...........(2)


2x-y = 1
x-y   = -1
---------------- -
x = 2

x-y = -1
2-y = -1
-y   = -1-2
-y   = -3
y    = 3

jadi, 2x-y= 2(2) - 3 = 4 - 3 = 1