SYNTENE LEARN . SAT MATH . ALGEBRA
If 3x + 5 = 20, what is the value of x?
Answer: B) 5. Subtract 5 from both sides: 3x = 15. Then divide both sides by 3: x = 5.
Step-by-step solution
Subtract 5 from both sides: 3x = 15. Then divide both sides by 3: x = 5.
Common mistake
Subtracting 5 from only one side, or forgetting to divide the 5 by 3.
Watch: 20-second video walkthrough
What is the answer to If 3x + 5 = 20, what is the value of x?
Answer: B) 5. Subtract 5 from both sides: 3x = 15. Then divide both sides by 3: x = 5.
How do you solve it?
Subtract 5 from both sides: 3x = 15. Then divide both sides by 3: x = 5.
What mistake do most students make?
Subtracting 5 from only one side, or forgetting to divide the 5 by 3.
What SAT topic is this?
Algebra. Practice more free Algebra questions with instant feedback at Syntene Learn.