Exercício Resolvido de Inequações
b)
\( 7x+28\leqslant 0 \)
\[
\begin{gathered}
7x+28\leqslant 0\\
7x\leqslant -28\\
x\leqslant\frac{-28}{7}\\
x\leqslant -4
\end{gathered}
\]
\[ \bbox[#FFCCCC,10px]
{V=\left.\phantom{{}}\right]\;-\infty ;-4\;\left.\phantom{{}}\right]}
\]