Q18. - Algebra 2

Question

If $4x+7=18$, what is the value of $12x+21$?

 

A. $2.75$

B. 32

C. 33

D. 54

Step-by-Step Solution

Answer

The correct option is 54.

Step 1- Observe the provided equation

The expression is three times of the left side of the equation.

Step 2 – Determine the required value

Perform multiplication of 3 on both sides of the provided equation.

 $\begin{array}{c}3\left(4x+7\right)=3\cdot 18\\ 12x+21=54\end{array}$

Step 3- Make the conclusion

As the provided expression is equivalent to the number 54 so it is the correct option.