Set 5: Systems Of Equations (Intermediate)

**Choice C is the best answer.** Using elimination or substitution: x = 7

Explanation

Answer: C

PROBLEM

Solve: 3x + 5y = 71, 3x + 3y = 51. Find x.

✓ Correct

Detailed Explanation

Choice C is the best answer. Using elimination or substitution: x = 7

Why others are wrong:

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

B: 9 is incorrect because it does not satisfy the equation.

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