Chapter 8, Problem 5STP

To determine

To find: the solution of the equation

Answer to Problem 5STP

The correct option is C

Explanation of Solution

Given:

Consider the equation: $-24+3n=-45$

A $n=23$

C $n=-7$

B $n=7$

D $n=-23$

Calculation:

First step is to add both sides of equation by 24.

  $\begin{array}{c}-24+3n+24=-45+24\\ 3n=-21\end{array}$

Divide both sides of equation by 3.

  $\begin{array}{l}\frac{3n}{3}=\frac{-21}{3}\\ n=-7\end{array}$

Conclusion:

Therefore, the correct option that gives solution of equation $-24+3n=-45$ is C