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Solved!

HP prime cannot solve double inequality

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HP Prime
Microsoft Windows 10 (64-bit)

Hi! I can't figure it out, what am I doing wrong? Why I can't solve double inequality?
I already tried to break double inequality to system of 2 inequalities, but it didn't work either:

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Oh, it seems like I have to manually simplify one side of the inequality and enter it as an assumption, and then type the other part in solve().
This sounds so tedious. I wish the input would be as easy as in wolframalpha.
Thank you for the help, Jan_D!

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No, it is easier. I meant posts 8 and 9.

You could do this:

You can also first assign 2*x+3 to f as follows:

f:=2*x+3

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Hi!, @Dopamine1:

For your case, you can use Boolean ... with solve ... { ... }

Too, with zeros ...

In comparison with Wolfram Alpha, you have ... [ ... ]

Kind Regards !.
Have a nice day !.