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4x+2y=2 | x2
7x+4y=2 | x1
8x+4y=4
7x+4y=2
dikurang jadi
x=2
tinggal masukin ke salah satu persamaan
4.2+2y=2
8+2y=2
2y=8-2
y=4/2
y=2
3x1+5y1 = 3.2.1 + 5.2.16+10= 16