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The x is the unknown. 3x + 2 by itself doesn't mean much, but when you turn it into an equality, the value for x can be learned by manipulating the equation. For example if 3x + 2 = 8, then 3x + 2 - 2 = 8 - 2, so 3x = 6. 3x/3 = 6/3, so x =2. The value for x may be a number, or it may be another equation, or another mathematical expression, depending on the nature of the problem.
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What is the answer to x cubed plus 3x squared plus 3x plus 2 divided by x plus 2?
x3+3x2+3x+2 divided by x+2 equals x2+x+1
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you mean: x+3x+3=x+18 so x=5
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