6
Answer: CSet 3: Systems Of Equations (Intermediate)
Explanation
PROBLEM
Solve: x + y = 9, 2x + 4y = 30. Find x.
Solve: x + y = 9, 2x + 4y = 30. Find x.
A.
5
B.
1
C.✓ Correct
3
D.
4
Detailed Explanation
Choice C is the best answer. Using elimination or substitution: x = 3
Why others are wrong:
A: 5 is incorrect because it does not satisfy the equation.
B: 1 is incorrect because it does not satisfy the equation.
D: 4 is incorrect because it does not satisfy the equation.