1) 8 * (2х - 11) + 7 * (3х - 22) = 4 * (х - 44)
16х - 88 + 21х - 154 = 4х - 176
16х + 21х - 4х = - 176 + 88 + 154
33х = 66
х = 66 : 33
х = 2
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8 * (2 * 2 - 11) + 7 * (3 * 2 - 22) = 4 * (2 - 44)
8 * (4 - 11) + 7 * (6 - 22) = 4 * (- 42)
8 * (- 7) + 7 * (- 16) = - 168
- 56 + (- 112) = - 168
- 168 = - 168
2) 25 * (х - 1) - 20 * (4х - 1) = 4 * (1 - 16х)
25х -25 - 80х + 20 = 4 - 64х
25х - 80х + 64х = 4 + 25 - 20
9х = 9
х = 9 : 9
х = 1
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25 * (1 - 1) - 20 * (4 * 1 - 1) = 4 * (1 - 16 * 1)
25 * 0 - 20 * 3 = 4 * (- 15)
- 60 = - 60
3) 4 * (х - 0,5) + 2 * (х - 0,25) + х - 0,125 = 0
4х - 2 + 2х - 0,5 + х - 0,125 = 0
4х + 2х + х = 2 + 0,5 + 0,125
7х = 2,625
х = 0,375
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4 * (0,375 - 0,5) + 2 * (0,375 - 0,25) + 0,375 - 0,125 = 0
4 * (- 0,125) + 2 * 0,125 + 0,375 - 0,125 = 0
- 0,5 + 0,25 + 0,375 - 0,125 = 0
- 0,25 + 0,375 - 0,125 = 0
0,125 - 0,125 = 0
0 = 0
4) 3 * (х - 5) + 4 * (х - 0,25) = 6 * (2 - х) + 11
3х - 15 + 4х - 1 = 12 - 6х + 11
3х + 4х + 6х = 12 + 11 + 15 + 1
13х = 39
х = 39 : 13
х = 3
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3 * (3 - 5) + 4 * (3 - 0,25) = 6 * (2 - 3) + 11
3 * (- 2) + 4 * 2,75 = 6 * (- 1) + 11
- 6 + 11 = - 6 + 11
5 = 5