Question: How to solve a combined inequality?

Can maple simplify a Combined Inequality? At best it outputs imho a more complicated solution.

Thanks in Advance.

sl10 := -1 <= (3-5*x)*(1/2) and (3-5*x)*(1/2) <= 9

0 <= 5/2-(5/2)*x and -(5/2)*x <= 15/2

(1)

The output should be:

 

-3 <= x and x <= 1


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