Question

No 20 tolong dong,pake cara yaa

Answer 1

2/3x - 1/2y = 2
4/6x - 3/6y = 12
4x - 3y = 12


1/2x + 1/4y = 4
2/4x + 1y = 16
2x + y = 16


4x - 3y = 12
2x + y = 16

4x - 3y = 12
4x + 2y = 32
      -5y = -20
         y = 4
         x = 6

x - 2y 
6 - 2(4)
6 - 8
-2 [B]