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2x + 5y = 19
3/4 x - 1/3 y = 5/10 (biar pecahan ilang, kalikan dg 60)
45 x - 20y = 30
2x + 5y = 19 | kali 4 bar y-nya sama| 8x + 20y = 76
45x - 20y = 30 | kali 1 biar ynya sam |45x -20y = 30+
53x = 106
x = 2
2x + 5y = 19
2(2) + 5y = 19
4 + 5y = 19
5y = 15
y = 3