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8

Set 3: Systems Of Equations (Advanced)

Explanation

Answer: D

PROBLEM

Solve: x + 4y = 36, 2x + 5y = 54. Find y.

Solve: x + 4y = 36, 2x + 5y = 54. Find y.

A.

4

B.

7

C.

5

D.

6

✓ Correct

Detailed Explanation

Choice D is the best answer. Using elimination or substitution: y = 6

Why others are wrong:
A: 4 is incorrect because it does not satisfy the equation.
B: 7 is incorrect because it does not satisfy the equation.
C: 5 is incorrect because it does not satisfy the equation.
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