11 -5X + 3x + 4x equal to 18
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11 - 5x + 3x + 4x = 18
> 11 + 2x = 18
> 2x + 11 = 18
> 2x + 11 - 11 = 18 - 11
> 2x = 7
> x = 7/2 or 3.5
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