Ответ:
Пошаговое объяснение:
б)2/3(х+9)-2=1/6х
(2/3)x + 6 - 2 = (1/6)x
4x + 36 - 12 = x
4x + 24 = x
4x - x = -24
3x = -24
x = -24:3
x = -8
в)-6=-2-(4+9х)
-6 = -2 - 4 - 9x
-6 = -6 - 9x
9x = 6-6
9x = 0
x = 0
г)1,2(5-4х)=-6(0,8х+1)
6 - 4,8x = -4,8x - 6
4,8x - 4,8x = -6 - 6
x ≠ -12
нет корней
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Answers & Comments
Ответ:
Пошаговое объяснение:
б)2/3(х+9)-2=1/6х
(2/3)x + 6 - 2 = (1/6)x
4x + 36 - 12 = x
4x + 24 = x
4x - x = -24
3x = -24
x = -24:3
x = -8
в)-6=-2-(4+9х)
-6 = -2 - 4 - 9x
-6 = -6 - 9x
9x = 6-6
9x = 0
x = 0
г)1,2(5-4х)=-6(0,8х+1)
6 - 4,8x = -4,8x - 6
4,8x - 4,8x = -6 - 6
x ≠ -12
нет корней
===================