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4 - (10x + 1 ) = 3 - 3x + x
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6 2 4
4 - (10x + 1 ) = 3 - 2 . 3x + x
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6 2 . 2 4
4 - (10x + 1 ) = 3 - 6x + x
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6 4 4
4 - (10x + 1 ) = 3 - 5x
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6 4
4 - 10x - 1 = 3 - 5x
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6 6 4
5x - 10x = 3 - 4 + 1
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4 6 6
30x - 40x = -1 + 1
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24 6
- 10x = - 5
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24 6
10x = 5
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24 6
10x = 5
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4
10x = 20
x = 20
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10
x = 2