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25 points Select the correct answer. Which equation combines with the given equation to form a system of equations with the solution x = 3 and y = 9? x + 2y = 21 A. 4x + 6y = 64 B. 2x + y = 36 C. 4x +
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25 points

Select the correct answer.
Which equation combines with the given equation to form a system of equations with the solution x = 3 and y = 9?

x + 2y = 21

A.
4x + 6y = 64
B.
2x + y = 36
C.
4x + y = 21
D.
-3x + 4y = 33
E.
3x + 2y = 28

User VinuBibin
by
7.0k points

2 Answers

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A=21 which is the correct answer
C=21 is also correct
Both A and C are correct
User Danil Chernokalov
by
7.7k points
7 votes
C. 4x + y = 21

4(3) + 9 = 21
12 + 9 = 21
21 = 21
User Hardik Parmar
by
8.2k points
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