Yahoo Answers: Answers and Comments for Can you match the equation in Column I with its equivalent equation in Column II (work needed)? [Mathematics]
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From Masterlet
enGB
Tue, 19 Nov 2019 11:14:05 +0000
3
Yahoo Answers: Answers and Comments for Can you match the equation in Column I with its equivalent equation in Column II (work needed)? [Mathematics]
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From David: 11 is B because x = 8 in both equations
12 is...
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https://uk.answers.yahoo.com/question/index?qid=20191119111405AAcgr0m
Tue, 19 Nov 2019 13:04:48 +0000
11 is B because x = 8 in both equations
12 is C because x = 9.5 in both equations
13 is A because x = 2 in both equations

From RealPro: How did you connect them in the first place? O...
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Tue, 19 Nov 2019 12:09:19 +0000
How did you connect them in the first place? Obviously you compared solutions. Two equations are "equivalent" if their solutions are equal. Obvious.
If you want some higher wisdom or something
11 multiply with 2
12 expand yes
13 divide with 3.
These happen to be the first commonly taken steps in solving each of these.
(If there was an even number on the right in 12, the more sensical approach would be to divide with 2 first)