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2K + 3B = 110.000
2K + 9K = 110.000
11K = 110.000
K = 10.000
5K = 50.000
Hrga baju = x
harga kaos = y
maka diketahui :
x = 3y
3x + 2y = 110.000
ditanya harga 5 buah kaos ?
penyelesaian :
subtitusi nilai x = 3y menjadi :
3x + 2y = 110.000
3 X (3y) + 2y = 110.000
9y + 2y = 110.000
11y = 110.000
y = 110.000/11
y = 10.000
jadi hrga 5 kaos = 5 x 10.000 = Rp 50.000