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1

Set 1: Systems Of Equations (Beginner)

Explanation

Answer: A

PROBLEM

Solve: 3x + 3y = 21, 2x + 3y = 17. Find y.

Solve: 3x + 3y = 21, 2x + 3y = 17. Find y.

A.

3

✓ Correct
B.

1

C.

5

D.

2

Detailed Explanation

Choice A is the best answer. Using elimination or substitution: y = 3

Why others are wrong:
B: 1 is incorrect because it does not satisfy the equation.
C: 5 is incorrect because it does not satisfy the equation.
D: 2 is incorrect because it does not satisfy the equation.
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