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2(2x + 3)
When x = -3
(2x+3)(x+3)
If you mean: 2x-3 = 3x+3 then x = -6
Well, darling, 2x plus 5 is just an algebraic expression that represents the sum of 2 times a variable x and 5. So, if you want to find the value of that expression, you need to know the value of x. Math can be a real hoot sometimes, can't it?