10
Answer: DSet 5: Systems Of Equations (Beginner)
Explanation
PROBLEM
Solve: 5x + 5y = 60, x + 2y = 20. Find y.
Solve: 5x + 5y = 60, x + 2y = 20. Find y.
A.
9
B.
7
C.
6
D.✓ Correct
8
Detailed Explanation
Choice D is the best answer. Using elimination or substitution: y = 8
Why others are wrong:
A: 9 is incorrect because it does not satisfy the equation.
B: 7 is incorrect because it does not satisfy the equation.
C: 6 is incorrect because it does not satisfy the equation.
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