3
Answer: ASet 3: Systems Of Equations (Beginner)
Explanation
PROBLEM
Solve: 3x + 3y = 39, 4x + y = 31. Find x.
Solve: 3x + 3y = 39, 4x + y = 31. Find x.
A.✓ Correct
6
B.
4
C.
5
D.
7
Detailed Explanation
Choice A is the best answer. Using elimination or substitution: x = 6
Why others are wrong:
B: 4 is incorrect because it does not satisfy the equation.
C: 5 is incorrect because it does not satisfy the equation.
D: 7 is incorrect because it does not satisfy the equation.