# $$3+x \geq 15$$, what is the value of $$x \geq$$ ?

12

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.