California Assessment of Student Performance and Progress (CAASPP) Math Practice Exam

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Solve for x: 3x + 5 = 20. What is the value of x?

The correct answer is: 5

To solve the equation 3x + 5 = 20, you can follow these steps: First, isolate the term containing x by subtracting 5 from both sides of the equation. This gives you: 3x + 5 - 5 = 20 - 5, which simplifies to 3x = 15. Next, to get the value of x, divide both sides of the equation by 3: 3x / 3 = 15 / 3, so x = 5. Thus, the value of x is 5, which is reflected in the correct choice. This method demonstrates the steps of linear equation solving, involving isolating variables and performing arithmetic operations.