Answer
$n=1.68$
Work Step by Step
Using the properties of equality, the solution to the given equation, $
6.4-2.5n=2.2
$, is
\begin{array}{l}
-2.5n=2.2-6.4
\\\\
-2.5n=-4.2
\\\\
n=\dfrac{-4.2}{-2.5}
\\\\
n=1.68
.\end{array}
Checking:
\begin{array}{l}
6.4-2.5(1.68)=2.2
\\\\
6.4-4.2=2.2
2.2=2.2
\text{ (TRUE)}
.\end{array}
Hence, the solution is $
n=1.68
.$
