- 2 = - 9 - 2(-2x + 1)
- 2 = - 9 + 4х - 2
-4х = -9 - 2 + 2
4х = 9
х = 2,25
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10 + 9(-10 - 9х) = 8 - х
10 - 90 - 81х = 8 - х
- 81х + х = -10 + 90 + 8
- 80х = 88
х = - 1,1
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- 1 + 8(7 - 6х) = 2х + 6
- 1 + 56 - 48х = 2х + 6
- 48х - 2х = 1 - 56 + 6
- 50х = - 49
х = 49/50
х = 0,98
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- 3х + 4 = - 10 + 5(- 7 - х)
- 3х + 4 = - 10 - 35 - 5х
-3х + 5х = -10 - 35 - 4
2х = - 49
х = - 24,5