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2x*7 -2zł
5x + 2x × 7 = 323
5x + 14x = 323
19x = 323
x = 17
17*5=85-5zł
2*17*7=238-2zł
85+238=323zł
7*2x-dwuzłotowki
5x+14x=323
19x=323
x=17
17 po 5zł
7*17=119 po 2 zł