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3

Set 3: Systems Of Equations (Advanced)

Explanation

Answer: C

PROBLEM

Solve: 4x + y = 35, 2x + 5y = 49. Find y.

Solve: 4x + y = 35, 2x + 5y = 49. Find y.

A.

5

B.

6

C.

7

✓ Correct
D.

9

Detailed Explanation

Choice C is the best answer. Using elimination or substitution: y = 7

Why others are wrong:
A: 5 is incorrect because it does not satisfy the equation.
B: 6 is incorrect because it does not satisfy the equation.
D: 9 is incorrect because it does not satisfy the equation.
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