Set 1: Systems Of Equations (Advanced)

**Choice A is the best answer.** Using elimination or substitution: x = 9

Explanation

Answer: A

PROBLEM

Solve: 5x + 5y = 60, 4x + 2y = 42. Find x.

✓ Correct

Detailed Explanation

Choice A is the best answer. Using elimination or substitution: x = 9

Why others are wrong:

B: 7 is incorrect because it does not satisfy the equation.

C: 11 is incorrect because it does not satisfy the equation.

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