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Николь7476600
@Николь7476600
July 2022
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Найдите корень уравнения : 1) 0,6 - 1,6 ( х - 4 ) = 3 ( 7 - 0,4х ) ;
2) x - 2 5
------ = ----- .
x - 7 8
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prettypushkova
Verified answer
1) 0,6 - 1,6 * (х - 4) = 3 * (7 - 0,4х)
0,6 - 1,6х + 6,4 = 21 - 1,2х
- 1,6х + 1,2х = 21 - 6,4 - 0,6
- 0,4х = 14
х = 14 : (-0,4)
х = - 35
--------------------------
Проверка: 0,6 - 1,6 * (-35 - 4) = 3 * (7 - 0,4 * (-35))
0,6 - 1,6 * (-39) = 3 * (7 + 14)
0,6 + 62,4 = 3 * 21
63 = 63
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Answers & Comments
Verified answer
1) 0,6 - 1,6 * (х - 4) = 3 * (7 - 0,4х)0,6 - 1,6х + 6,4 = 21 - 1,2х
- 1,6х + 1,2х = 21 - 6,4 - 0,6
- 0,4х = 14
х = 14 : (-0,4)
х = - 35
--------------------------
Проверка: 0,6 - 1,6 * (-35 - 4) = 3 * (7 - 0,4 * (-35))
0,6 - 1,6 * (-39) = 3 * (7 + 14)
0,6 + 62,4 = 3 * 21
63 = 63