(3х + 5х) * 18 = 114
8х * 18 = 114
144х = 114
х = 114 : 144
х = 114/144 = 19/24
-------------------------------
Если в записи уравнения ошибка:
(3х + 5х) * 18 = 144
8х * 18 = 144
144х = 144
х = 144 : 144
х = 1
--------------
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Verified answer
(3х + 5х) * 18 = 114
8х * 18 = 114
144х = 114
х = 114 : 144
х = 114/144 = 19/24
-------------------------------
Если в записи уравнения ошибка:
(3х + 5х) * 18 = 144
8х * 18 = 144
144х = 144
х = 144 : 144
х = 1
--------------