16 = 2x
6x = 480
5600 = 80x
125 + 34 = 256 - a
3x + 12 = 24 - 5 + 2x -1
2x + 8 = 18 - 3x
3x = 120
4x - 25 = 2x + x + 8
x + 120 = 230
20 - z = - 25
118 + 2x = 4x - 2
2x - 7 + x = 2 + x + 9
108 = 9x
2x - 23 = 4 - 6x + 13
4x = 76
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