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Tshirt = S
Topi = T
3S + 4T = 960.000
2S + 5T = 990.000
Samakan shirt
6S + 8T = 1.920.000[x2]
6S + 15T = 2.970.000[x3]
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eliminasi = -7T =1.050.000
Topi = -1050000 ÷7 = 150.000
topi dimisalkan y
3x + 4y = 960000 lx2 = 6x + 8y = 1920000
2x + 5y = 990000 lx3 = 6x + 15y = 2970000
------------------------------- -
-7y = -1050000
y = 1050000/7 (mjd positip, karena negatif dibagi y = 150000 negatif = positif)
3x + 4y = 960000
3x + 4(150000) = 960000
3x +