Ответы на вопрос:
1) 6,6 2) 2
Объяснение:
1) ((3x - 7) : 8) - ((x - 3) : 6) = 1
((9x - 21) : 24) - ((4x - 12) : 24)) = 1
((9x - 21) - (4x - 12)) : 24 = 1
(9x - 21 - 4x + 12) : 24 = 1
(5x - 9) : 24 = 1
5x - 9 = 24
5x = 24 + 9
5x = 33
x = 33 : 5
x = 6,6
ответ: 6,6
2) (3x + 4)(4x - 3) - 5 = (2x + 5)(6x - 7)
12x² - 9x + 16x - 12 - 5 = 12x² - 14x + 30x - 35
12x² + 7x - 17 = 12x² + 16x - 35
7x - 17 = 12x² - 12x² + 16x - 35
7x - 17 = 16x - 35
7x = 16x - 35 + 17
7x = 16x - 18
16x - 18 = 7x
18 = 16x - 7x
18 = 9x
x = 18 : 9
x = 2
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