1) - 2х + 4 = 3х - 21
- 2х - 3х = - 21 - 4
- 5х = - 25
х = - 25 : (- 5)
х = 5
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2) 4х - (3 - 2х) = - (13 - 5х)
4х - 3 + 2х = - 13 + 5х
4х + 2х - 5х = - 13 + 3
х = - 10
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3) 4 * (3 - 2х) + 24 = 2 * (3 + 2х)
12 - 8х + 24 = 6 + 4х
- 8х - 4х = 6 - 24 - 12
- 12х = - 30
х = - 30 : (- 12)
х = 2,5
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4) 4х + 3 = - 16
4х = - 16 - 3
4х = - 19
х = -19 : 4
х = - 4,75
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5) - 5х + 9 = 2х + 3
- 5х - 2х = 3 - 9
- 7х = - 6
х = - 6 : (- 7)
х = 6/7
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6) 4,72 - 2,5x = 2x + 2,92
- 2,5х - 2х = 2,92 - 4,72
- 4,5х = - 1,8
х = - 1,8 : (- 4,5)
х = 0,4
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