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Answer: CSet 3: Systems Of Equations (Advanced)
Explanation
PROBLEM
Solve: x + 3y = 25, 3x + y = 27. Find y.
Solve: x + 3y = 25, 3x + y = 27. Find y.
A.
4
B.
7
C.✓ Correct
6
D.
8
Detailed Explanation
Choice C is the best answer. Using elimination or substitution: y = 6
Why others are wrong:
A: 4 is incorrect because it does not satisfy the equation.
B: 7 is incorrect because it does not satisfy the equation.
D: 8 is incorrect because it does not satisfy the equation.