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x = koper
y = tas
2x+5y = 600.000 | 3
3x+2y = 570.000 | 2
---------------------------------- x
6x+15y = 1.800.000
6x+ 4y = 1.140.000
---------------------------------- -
11y = 660.000
y = 660.000
--------------
9
y = 60.000
Substitusikan
2x + 5y = 600.000
2x + 5(60.000) = 600.000
2x + 300.000 = 600.000
2x = 600.000 - 300.000
2x = 300.000
x = 300.000
--------------
2
x = 150.000
1 koper dan 2 tas
x + 2y = 150.000 + 2(60.000)
= 150.000 + 120.000
= 270.000
Jadi harga sebuah koper dan 2 tas dalah Rp. 270.000