Question

Fill in the blanks:

$9+......=-2$

Answer 1

Let the unknown number here is $x$

$\begin{array}{rcl}9+x& =& -2\end{array}$

So, since the given numbers are of like signs, let's add the absolute values directly and give the common sign for the result.

$\begin{array}{rcl}x& =& -2+(-9)\\ x& =& -11\end{array}$

Hence, the answer is $-11$