3 + 3 + 2x = 0
6 + 2x = 0
2x = -6
x = -6/2
x = -3
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It is and expression which is equivalent to twice a number, x, increased by three. Without further information about the value of x, you cannot say anything more about the expression.
You can't simplify this particular expression.The value of an expression such as 2x + 3 will depend on the value of variables, in this case, "x".
It is 2x + 3 and unless you know the value of x, you will get no further in answering the question.
6x2 + 11x + 3 = 6x2 + 9x + 2x + 3 = 3x(2x + 3) + 1(2x + 3) = (2x + 3)(3x + 1)
If 3x + 3 = 2x + 6 then 3x - 2x = 6 - 3 x = 3
(2x - 3)(2x - 3)
3x + 5x = 2x + 28x = 2x + 26x = 2x = (2/6) = 1/3
x= -3