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7

Set 2: Systems Of Equations (Intermediate)

Explanation

Answer: A

PROBLEM

Solve: 3x + 4y = 63, x + 3y = 36. Find y.

Solve: 3x + 4y = 63, x + 3y = 36. Find y.

A.

9

✓ Correct
B.

8

C.

10

D.

11

Detailed Explanation

Choice A is the best answer. Using elimination or substitution: y = 9

Why others are wrong:
B: 8 is incorrect because it does not satisfy the equation.
C: 10 is incorrect because it does not satisfy the equation.
D: 11 is incorrect because it does not satisfy the equation.
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