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Eliminasi Y :
4x + 3y = 13.500 x3 12x + 9y = 40.500
3x + 2y = 9.750 x4 12x + 6y = 39.000 -
3y = 1.500
y = 1500
3
y = 500
y = 500 disubtitusikan 4x + 3y = 13.500
4x + 3.500 = 13.500
4x + 1500 = 13.500
4x = 13.500 - 1500
4x = 12.000
x = 12.000
4
x = 3.000
Jadi, brp harga 2 buku dan 3 pensil????
Buku x dan Pensil y
x = 3000
y = 500
: 2 x 3000 = 6000
: 3 x 500 = 1.500
Harga seluruhnya 7.500