10
Answer: ASet 2: Systems Of Equations (Advanced)
Explanation
PROBLEM
Solve: 5x + 4y = 87, x + 2y = 27. Find y.
Solve: 5x + 4y = 87, x + 2y = 27. Find y.
A.✓ Correct
8
B.
9
C.
7
D.
6
Detailed Explanation
Choice A is the best answer. Using elimination or substitution: y = 8
Why others are wrong:
B: 9 is incorrect because it does not satisfy the equation.
C: 7 is incorrect because it does not satisfy the equation.
D: 6 is incorrect because it does not satisfy the equation.
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