Solve for x in the equation: 3x + 5 = 20.

To solve the equation 3x + 5 = 20, the first step is to isolate the variable x. This can be done by first eliminating the constant on the left side of the equation.

Start by subtracting 5 from both sides: 3x + 5 - 5 = 20 - 5,

which simplifies to: 3x = 15.

Next, to solve for x, divide both sides by 3: 3x / 3 = 15 / 3, resulting in: x = 5.

Thus, the correct answer is x = 5. This solution confirms that when substituting x back into the original equation, the equality holds true. If you replace x with 5, the left side becomes 3(5) + 5, which evaluates to 15 + 5 = 20, matching the right side of the equation. This consistency validates that x = 5 is indeed the correct solution.