5
Answer: DSet 1: Systems Of Equations (Advanced)
Explanation
PROBLEM
Solve: 3x + y = 13, 4x + y = 16. Find x.
Solve: 3x + y = 13, 4x + y = 16. Find x.
A.
4
B.
1
C.
2
D.✓ Correct
3
Detailed Explanation
Choice D is the best answer. Using elimination or substitution: x = 3
Why others are wrong:
A: 4 is incorrect because it does not satisfy the equation.
B: 1 is incorrect because it does not satisfy the equation.
C: 2 is incorrect because it does not satisfy the equation.