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Disini saya pake cara cepat
8x + 4y-16=0
8x + 4y=16
8x + 4y=16 melalui 5,-3
langsung 8x5=40 4x-3=-12
8x + 4y=40-12
8x + 4y=28
-----------------:4 (dibagi 4)
2x + y=7
2x + y -7 =0