Mathematics knowledge · Difficulty 2
Try this ASVAB-style question.
Choose your answer before opening the explanation. This original practice item is for preparation and does not reproduce an official test question.
Solve for x: x + 8 = 21.
- 18
- 13
- 15
- 10
Reveal answer and explanation
13
Subtract 8 from both sides: x = 21 - 8 = 13.