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5x + 6y = 30.000 (dikali6) 30x + 24y =180.000
2x + 6y = 23.000 (dikali4) 8x + 24y = 92000 (atas bawah dikurang)
= 22x =88000
x=4000
2x + 6y = 23000
2.4000 + 6y = 23000
8000 + 6y = 23000
6y =23000-8000
y = 15000/6
y = 2500
3pulpen dan 2pensil
3x + 2y
3.4000 + 2.2500
12000 + 5000
17000