Set 2: Linear Equations (Intermediate)

**Choice C is the best answer.** Solve step by step: x = 7

Explanation

Answer: C

PROBLEM

Solve for x: 3x + 0 = 21

✓ Correct

Detailed Explanation

Choice C is the best answer. Solve step by step: x = 7

Why others are wrong:

A: 8 is incorrect because it does not satisfy the equation.

B: 5 is incorrect because it does not satisfy the equation.

D: 6 is incorrect because it does not satisfy the equation.