tolong dijawab... Terima ksh

x= a y= b

x-3y= 12 persamaan 1(dikali 2)
2x+5y= 2 persamaan 2 (dikli 1)

2x-6y=24
2x+5y=2
pers 1 - pers 2
-11y=22
y= -2
masukin y= -2 ke pers 1
x-3(-2)=12
x+6=12
x=12-6
x=6


2a-b
2(6)-(-2)
12+2=14(d)