Варвара Павленко
Яна
1)
x - 5 >= 0
2x - 5 >= 0
x - 1 >= 0 x >= 5
2(x - 5) = 3(2x - 5) - 4(x - 1)
2x - 10 = 6x - 15 - 4x + 4
x E O/
2)
x - 5 < 0
2x - 5 >= 0
x -1 >= 0 x E [2.5; 5)
-2(x - 5) = 3(2x - 5) - 4(x - 1)
-2x + 10 = 6x - 15 - 4x + 4
4x = 21
x = 5.25 - не подходит
3)
x - 5 >= 0
2x - 5 < 0
x - 1 >= 0 x E O/
4)
x - 5 >= 0
2x - 5 >= 0
x - 1 < 0 x E O/
5)
x - 5 < 0
2x - 5 < 0
x - 1 >= 0 x E [1; 2.5)
-2(x - 5) = -3(2x - 5) - 4(x - 1)
-2x + 10 = -6x + 15 - 4x + 4
8x = 9
x = 1.125
6)
x - 5 >= 0
2x - 5 < 0
x - 1 < 0 x E O/
7)
x - 5 < 0
2x - 5 >= 0
x - 1 < 0 x E O/
Ответ x = 1.125, x E [1; 2.5).
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