Question

one-step & two-step equations
solve the equation:
$3n - 15 = 7n + n$
$\bigcirc$ n= 3
$\bigcirc$ n= 0
$\bigcirc$ idk
$\bigcirc$ n= -3

Explanation:

Step1: Combine like terms on right

$3n - 15 = 8n$

Step2: Subtract $3n$ from both sides

$-15 = 8n - 3n$
$-15 = 5n$

Step3: Divide by 5 to solve for $n$

$n = \frac{-15}{5}$

Answer:

D. n=-3