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9

Set 5: Systems Of Equations (Intermediate)

Explanation

Answer: D

PROBLEM

Solve: 5x + 4y = 64, 3x + 2y = 36. Find y.

Solve: 5x + 4y = 64, 3x + 2y = 36. Find y.

A.

5

B.

8

C.

4

D.

6

✓ Correct

Detailed Explanation

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

Why others are wrong:
A: 5 is incorrect because it does not satisfy the equation.
B: 8 is incorrect because it does not satisfy the equation.
C: 4 is incorrect because it does not satisfy the equation.
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