Question

solve.
0.6(10n + 25) = 10 + 5n
options: n = 15, n = -5, n = 5, n = -15

Explanation:

Step1: Expand left-hand side

$0.6\times10n + 0.6\times25 = 10 + 5n$
$6n + 15 = 10 + 5n$

Step2: Isolate variable terms

$6n - 5n = 10 - 15$

Step3: Simplify both sides

$n = -5$

Answer:

$n = -5$