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Chapter 1: Q18. (page 24)

If $4 x + 7 = 18$ , what is the value of $12 x + 21$ ?
A. $2.75$
B. 32
C. 33
D. 54

Short Answer

Expert verified

The correct option is 54.

Step by step solution

Step 1- Observe the provided equation

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

– Determine the required value

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

$\begin{matrix} 3 (4 x + 7) = 3 \cdot 18 \\ 12 x + 21 = 54 \end{matrix}$

Step 3- Make the conclusion

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

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If $4 x + 7 = 18$ , what is the value of $12 x + 21$ ?
A. $2.75$
B. 32
C. 33
D. 54

Short Answer

Step by step solution

Step 1- Observe the provided equation

– Determine the required value

Step 3- Make the conclusion

One App. One Place for Learning.

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If 4x+7=18, what is the value of 12x+21?A. 2.75B. 32C. 33D. 54

Short Answer

Step by step solution

Step 1- Observe the provided equation

– Determine the required value

Step 3- Make the conclusion

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Probability and Statistics

Discrete Mathematics

Applied Mathematics

Calculus

Decision Maths

Statistics

Study anywhere. Anytime. Across all devices.

If $4 x + 7 = 18$ , what is the value of $12 x + 21$ ?
A. $2.75$
B. 32
C. 33
D. 54