Question

write five more than three times a number equals 21 as an equation.
3x + 5 = 21
5x + 3 = 21
3x(5) = 21
5x(3) = 21

Explanation:

Let the number be \( x \). "Three times a number" is \( 3x \). "Five more than three times a number" means adding 5 to \( 3x \), so it is \( 3x + 5 \). This equals 21, so the equation is \( 3x + 5 = 21 \).

Answer:

A. \( 3x + 5 = 21 \)