10
Answer: ASet 1: Systems Of Equations (Advanced)
Explanation
PROBLEM
Solve: x + 4y = 31, 3x + 3y = 30. Find x.
Solve: x + 4y = 31, 3x + 3y = 30. Find x.
A.✓ Correct
3
B.
2
C.
1
D.
5
Detailed Explanation
Choice A is the best answer. Using elimination or substitution: x = 3
Why others are wrong:
B: 2 is incorrect because it does not satisfy the equation.
C: 1 is incorrect because it does not satisfy the equation.
D: 5 is incorrect because it does not satisfy the equation.
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