Question

Solve & graph the solution set of $3x+6\ge 9$ and $-5x>-15$, $x\in R$.

Answer 1

$3x+6\ge 9and-5x>-15$
$\Rightarrow 3x\ge 3$ and $-x>-3$
$\Rightarrow x\ge 1$ and $x<3$
combining the solution So the solution is $x\in [1,3)$