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2x+3y= 15/2
> 4x+2y = 5 (dikali 1)
2x+3y = 15/2 (dikali 2)
> 4x+2y = 5
4x+6y=15
> 8y=20
>y=20/8
. 2x+3y=15/2
>2x+3.20/8=15/2
>2x+60/8=15/2
>2x=60/8-60/8
>x=2