10
Answer: ASet 3: Systems Of Equations (Advanced)
Explanation
PROBLEM
Solve: 3x + 3y = 69, 2x + 3y = 57. Find y.
Solve: 3x + 3y = 69, 2x + 3y = 57. Find y.
A.✓ Correct
11
B.
12
C.
10
D.
13
Detailed Explanation
Choice A is the best answer. Using elimination or substitution: y = 11
Why others are wrong:
B: 12 is incorrect because it does not satisfy the equation.
C: 10 is incorrect because it does not satisfy the equation.
D: 13 is incorrect because it does not satisfy the equation.
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