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masukkan nilai y ke dalam persamaan 2x-3y=12
2x-3y=12
2x-3(-11+3x)=12
2x+33-9x=12
33-7x=12
-7x=12-33
x= -21/-7
x= 3
masukkan nilai x ke dalam persamaan -3x+y=-11
-3x+y=-11
-3(3)+y=-11
-9+y=-11
y= -11+9
y= -2