10

Set 2: Systems Of Equations (Advanced)

Explanation

Answer: A

PROBLEM

Solve: 5x + 4y = 87, x + 2y = 27. Find y.

Solve: 5x + 4y = 87, x + 2y = 27. Find y.

A.

8

✓ Correct
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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