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(x+2y=10)x2==> 2x+4y=20
____________________ --
-y = -14
y= 14
jika y=14 ==> 2x+3y=6
==> 2x+3(14)=6
===> 2x+42=6
===> 2x=6-42
==> 2x=-36
===> x=-36/2
===> x= -18
Terima kasih