If 3x = 18, what is the value of 5x − 4?
Correct answer: B. 26
From 3x = 18, x = 6. Then 5x − 4 = 30 − 4 = 26. The option 86 comes from wrongly using 18 in place of x. Always solve for x first, then substitute into the new expression.
easy
Answer and explanation
The correct answer is B. 26
From 3x = 18, x = 6. Then 5x − 4 = 30 − 4 = 26. The option 86 comes from wrongly using 18 in place of x. Always solve for x first, then substitute into the new expression.
Topic: Algebra and Equations MCQs · Subject: Numerical Ability