Answer
$13-3i$
Work Step by Step
$\bf{\text{Solution Outline:}}$
To simplify the given expression, $
(6-i)+(7-2i)
,$ remove the grouping symbols and then combine the real parts and the imaginary parts.
$\bf{\text{Solution Details:}}$
Removing the grouping symbols, the expression above is equivalent to
\begin{array}{l}\require{cancel}
6-i+7-2i
.\end{array}
Combining the real parts and the imaginary parts results to
\begin{array}{l}\require{cancel}
(6+7)+(-i-2i)
\\\\=
13-3i
.\end{array}