1
Answer: CSet 1: Systems Of Equations (Advanced)
Explanation
PROBLEM
Solve: 4x + 5y = 67, 5x + y = 47. Find y.
Solve: 4x + 5y = 67, 5x + y = 47. Find y.
A.
8
B.
5
C.✓ Correct
7
D.
9
Detailed Explanation
Choice C is the best answer. Using elimination or substitution: y = 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: 9 is incorrect because it does not satisfy the equation.