1)
4(3-x) = -5*7x
12-4x = -35x
-4x+35x = -12
31x = -12
x=
Ответ: x=
2)
|3x-1| = 5
3x-1 = 5 и 3x-1 = -5
1. 3x-1 = 5
3x = 5 + 1
3x = 6
x = 2
2. 3x-1 = 5
3x = -5 + 1
3x = -4
x =
Ответ: x = 2 и x =
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Answers & Comments
1)
4(3-x) = -5*7x
12-4x = -35x
-4x+35x = -12
31x = -12
x=
Ответ: x=
2)
|3x-1| = 5
3x-1 = 5 и 3x-1 = -5
1. 3x-1 = 5
3x = 5 + 1
3x = 6
x = 2
2. 3x-1 = 5
3x = -5 + 1
3x = -4
x =
Ответ: x = 2 и x =