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5

Set 2: Systems Of Equations (Intermediate)

Explanation

Answer: C

PROBLEM

Solve: 3x + y = 10, 4x + 5y = 28. Find y.

Solve: 3x + y = 10, 4x + 5y = 28. Find y.

A.

3

B.

6

C.

4

✓ Correct
D.

2

Detailed Explanation

Choice C is the best answer. Using elimination or substitution: y = 4

Why others are wrong:
A: 3 is incorrect because it does not satisfy the equation.
B: 6 is incorrect because it does not satisfy the equation.
D: 2 is incorrect because it does not satisfy the equation.
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