Question

умоляю помогите!!!!!​

Answer 1

$\displaystyle -\frac{3}{7}x\geq 9\\ \\-\frac{7}{3}*(-\frac{3}{7})x\leq -\frac{7}{3}*9\\ \\x\leq -7*3\\ x\leq -21=x \in (- \infty,-21]$