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x-5y= -37 *3 cari y (pake eliminasi).
dapet,
3x+2y= 8
3x-15y= -111
------------------- - (dikurang)
. 17y= 119
y= 119: 17= 7.
cari x (pake substitusi)
x-5y= -37
x-5(7)= -37
x-35= -37
x= -37+ 35
x= -2
* 6x+4y
=6(-2)+4(7)
= -12+28
= 16
semoga membantu :))