diketahui persaman 3×+2y =8 dan + - 5y=-37 maka nilai 6×+4y

3x+2y=8 ×1 3×+ 2y=8
x-5y=-37 ×3 3×-15y=-111
___________-
17y=119
y=7

3x+2y =8
3x+2(7) =8
3×+14 =8
3× =8-14
3× =-6
× =-2

6×+4y=6(-2)+4(7)
=-12+28
=16