Resposta :
[tex]\boxed{\begin{array}{l}\tt a)~\sf2x+3x>15\\\tt b)~\sf\dfrac{x}{2}-3x<27\\\tt c)~\sf\dfrac{x}{4}<4x\end{array}}[/tex]
[tex]\boxed{\begin{array}{l}\tt a)~\sf2x+3x>15\\\tt b)~\sf\dfrac{x}{2}-3x<27\\\tt c)~\sf\dfrac{x}{4}<4x\end{array}}[/tex]