a) 8x - 0,5x - x = 3x
8x - 0,5x - x -3x = 0
x = 0
b) 0,5x + 3,5 + 3 = 4 - x
0,5x +x = -3,5 - 3 + 4
1,5x = -2,5
x = -1 2/3
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a) 8x - 0,5x - x = 3x
8x - 0,5x - x -3x = 0
x = 0
b) 0,5x + 3,5 + 3 = 4 - x
0,5x +x = -3,5 - 3 + 4
1,5x = -2,5
x = -1 2/3