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3

Set 1: Systems Of Equations (Beginner)

Explanation

Answer: C

PROBLEM

Solve: x + 5y = 39, 5x + 4y = 48. Find y.

Solve: x + 5y = 39, 5x + 4y = 48. Find y.

A.

9

B.

6

C.

7

✓ Correct
D.

8

Detailed Explanation

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

Why others are wrong:
A: 9 is incorrect because it does not satisfy the equation.
B: 6 is incorrect because it does not satisfy the equation.
D: 8 is incorrect because it does not satisfy the equation.
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