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6x = 24 /:6
x=4
Odp.: Szukana liczba to 4.
x*7-4 = x+20
7x-x = 20+4
6x = 24 |:6
x = 4 << szukana liczba
7 * x - 4 = x + 20
7x - 4 = x + 20 ||-x
6x - 4 = 20 ||+4
6x = 24 ||:6
x = 4
Ta liczba to 4