Odpowiedź :
5 + 6 • x = 23
5 + 6x = 23
6x = 23 - 5
6x = 18 | : 6
x = 3
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sprawdzenie
5 + 6 • 3 = 23
5 + 18 = 23
23 = 23
5 + 6 • x = 23
5 + 6x = 23
6x = 23 - 5
6x = 18 | : 6
x = 3
---------------------------
sprawdzenie
5 + 6 • 3 = 23
5 + 18 = 23
23 = 23