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x <--- kiwi
2 * 1,5x + 6x = 4,5zł
3x + 6x = 4,5zł
9x = 4,5zł
x = 4,5 : 9
x = 0,5zł <---kiwi
1,5 * 0,5zł = 0,75zł <---grapefruit
x - kiwi
2 * 1,5x + 6x = 4,5
3x + 6x = 4,5
9x = 4,5 /:9
x = 0,5zł --- jedna sztuka kiwi
1,5 * 0,5zł = 0,75zł -- jedna sztuka grapefruita
Spr. 6 * 0,5 + 2 * 0,75 = 4,50
Pozdrawiam:)