Answer
Inequality : $ 6\leq x+15$
Solution : $ x\geq -9$
Work Step by Step
Let the number is $x$.
Sum of $x$ and $15$ is $x+15$.
Six is less than or equal to $x+15$.
The inequality is
$\Rightarrow 6\leq x+15$
Subtract $15$ from each side.
$\Rightarrow 6-15\leq x+15-15$
Simplify.
$\Rightarrow -9\leq x$
