Question

Solve the following for x, round to the nearest tenth when necessary.

3x + 1 = 10
A. x = 3.0
B. x = 3.3
C. x = 2.3
D. x = 2.0

Answer 1

The equation 3x + 1 = 10 can be solved by subtracting 1 from both sides and then dividing by 3, resulting in x = 3.0. Therefore, the correct answer is A. x = 3.0.

Step-by-step explanation:

To solve the equation 3x + 1 = 10 for x, we must isolate x on one side of the equation. Here's the step-by-step process:

1. Subtract 1 from both sides of the equation: 3x + 1 - 1 = 10 - 1, which simplifies to 3x = 9.
2. Divide both sides by 3 to solve for x: 3x / 3 = 9 / 3, resulting in x = 3.

Therefore, the value of x is 3.0, and rounding to the nearest tenth is not necessary in this case because it is a whole number. The correct answer is A. x = 3.0.