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x-y=2
------ -
2y= 8
y= 8/2
y=4
x+y=10
x+4=10
x=10-4
× =6
2... x-y=2
eliminasi x dari pers.1&2, hasilnya
2y=8
y=4
subs. nilai y ke pers 1
x+y=10
x+4=10
x=6