5
Answer: CSet 2: Systems Of Equations (Advanced)
Explanation
PROBLEM
Solve: 5x + 3y = 75, x + 3y = 27. Find y.
Solve: 5x + 3y = 75, x + 3y = 27. Find y.
A.
7
B.
4
C.✓ Correct
5
D.
6
Detailed Explanation
Choice C is the best answer. Using elimination or substitution: y = 5
Why others are wrong:
A: 7 is incorrect because it does not satisfy the equation.
B: 4 is incorrect because it does not satisfy the equation.
D: 6 is incorrect because it does not satisfy the equation.