Question

9 - (3n - 4) + 6n = -2(5n - 6.5) + 13n

Explanation:

Step1: Expand parentheses

$9 - 3n + 4 + 6n = -10n + 13 + 13n$

Step2: Combine like terms left side

$13 + 3n = -10n + 13 + 13n$

Step3: Combine like terms right side

$13 + 3n = 3n + 13$

Step4: Isolate variable terms

$13 + 3n - 3n = 13$

Step5: Simplify final equation

$13 = 13$

Answer:

All real numbers are solutions (the equation is an identity).