\(3+x \geq 15\), what is the value of \(x \geq\) ?
Explanation
Solve as you would solve for any unknown. \(3+x \geq 15 ; 3+x-3 \geq 15-3 . \text { Or, } x \geq 12\) . To check your answer, substitute 12 for x. \(3+12 \geq 15\). True, so the answer is correct.