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9

Set 4: Systems Of Equations (Beginner)

Explanation

Answer: B

PROBLEM

Solve: 4x + 5y = 42, 2x + 4y = 24. Find y.

Solve: 4x + 5y = 42, 2x + 4y = 24. Find y.

A.

1

B.

2

✓ Correct
C.

3

D.

4

Detailed Explanation

Choice B is the best answer. Using elimination or substitution: y = 2

Why others are wrong:
A: 1 is incorrect because it does not satisfy the equation.
C: 3 is incorrect because it does not satisfy the equation.
D: 4 is incorrect because it does not satisfy the equation.
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