Ответ:
(9-2,3х) × 5 = 15 × (1,4х - 3,5)
45 - 11,5х = 21х - 52,5
-11,5х - 21х = -52,5 - 45
-32,5х = -97,5
х = 3
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Ответ:
(9-2,3х) × 5 = 15 × (1,4х - 3,5)
45 - 11,5х = 21х - 52,5
-11,5х - 21х = -52,5 - 45
-32,5х = -97,5
х = 3