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If 2x(x-y)=54 and x=9, then y= A. 6 B. 3 C. 2 D. 1

If 2x(x-y)=54 and x=9, then y= A. 6 B. 3 C. 2 D. 1
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13 votes
If 2x(x-y)=54 and x=9, then y=

A. 6
B. 3
C. 2
D. 1

User Luca De Nardi
by
7.8k points

2 Answers

11 votes
Im guessing it’s A but I’m not really sure hopefully it’s right
User Bschauer
by
8.5k points
11 votes

Answer:

A. 6

Explanation:


2x(x - y) = 54 \\ 2(9)(9 - y) = 54 \\ 18(9 - y) = 54 \\ 9 - y = (54)/(18) \\ 9 - y = 3 \\ y = 9 - 3 \\ y = 6

User Kamaldeep Singh
by
8.0k points
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