Question

Which equation is true when x=5?
A. 2x = 10
B. 3x = 35
C. x - 3 = 8
D. x - 5 = -10

Answer 1

To determine which equation is true when \( x = 5 \), we can substitute \( x \) with \( 5 \) in each option:

A. \( 2x = 10 \)
\[
2(5) = 10 \quad \text{(True)}
\]

B. \( 3x = 35 \)
\[
3(5) = 15 \quad \text{(False, since 15 does not equal 35)}
\]

C. \( x - 3 = 8 \)
\[
5 - 3 = 2 \quad \text{(False, since 2 does not equal 8)}
\]

D. \( x - 5 = -10 \)
\[
5 - 5 = 0 \quad \text{(False, since 0 does not equal -10)}
\]

The only true equation when \( x = 5 \) is:
**A. \( 2x = 10 \)**.