Question

solve for a.
9 - a ≥ 7.23

Explanation:

Step1: Subtract 9 from both sides

$9 - a-9\geq7.23 - 9$
$-a\geq - 1.77$

Step2: Multiply both sides by -1 and reverse the inequality sign

When we multiply or divide an inequality by a negative number, the direction of the inequality sign changes. So, $(-1)\times(-a)\leq(-1)\times(- 1.77)$
$a\leq1.77$

Answer:

$a\leq1.77$