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5x = 20
x = 20/5
x = 4
2) 3x + 5 = 2x + 6
3x - 2x = 6 - 5
x = 1
3) 8x + 6 + x = x + 5 + 1
9x + 6 = x + 6
9x - x = 6 - 6
7x = 0
x = 0/7
x = 0
4) - 2x - 12 + 1 = - 3x + 4
- 2x - 11 = - 3x + 4
- 2x + 3x = 4 + 11
x = 15
5) x - 2 + 7 = 8x - 15
x + 5 = 8x - 15
x - 8x = - 15 - 5
- 7x = - 20
x = - 20/-7
x = 20/7
6) 20 + x - 1 = - 9x + 5
x + 19 = - 9x + 5
x + 9x = 5 - 19
10x = - 14
x = - 14/10
x = - 7/5
7) 3x + 6 - 2x = - 5x + 6 - 3
x + 6 = - 5x + 3
x + 5x = 3 - 6
6x = - 3
x = - 3/6
x = - 1/2
8) 12x - 144 = 0
12x = 144
x = 144/12
x = 12
9) 13x + 0 = 169
13x = 169
x = 169/13
x = 13
10) 11x + 11 = x + 50
11x - x = 50 - 11
10x = 39
x = 39/10
2x + 14 = x + 34
x = 34 - 14
x = 20
3(x - 2) = 2x + 4
3x - 6 = 2x + 4
3x - 2x = 4 + 6
x = 10
3x/2 + 25 = 10
3x/2 = 10 - 25
3x/2 = - 15
3x = - 15* 2
3x = - 30
x = - 30/3
x = - 10
4x + 36 = 6(x - 40)
4x + 36 = 6x - 240
36 + 240 = 6x - 4x
276 = 2x
276/2 = x
138 = x
x/2 + x = 30
x/2 + 2x/2 = 30
(x + 2x)/2 = 30
3x/2 = 30
3x = 30 * 2
3x = 60
x = 60/3
x = 20
10x + 41 + 5x = - 10
17x + 41 = - 10
17x = - 10 - 41
17x = - 51
x = - 51/17
x = - 3
5x + 8 = - 8
5x = - 8 - 8
5x = - 16
x = - 16/5
3(2x - 12) = 5( - x - 4)
6x - 36 = - 5x - 20
6x + 5x = - 20 + 36
11x = 16
x = 16/11
7x/2 + 3x - 84 = 2x - 32
7x/2 + 3x - 2x = - 32 + 84
7x/2 + x = 52
7x/2 + 2x/2 = 52
(7x + 2x)/2 = 52
9x/2 = 52
9x = 52 * 2
9x = 104
x = 104/9
10x + 35 - 4x + 10 = 8x + 24
6x + 45 = 8x + 24
45 - 24 = 8x - 6x
21 = 2x
21/2 = x