Answer:
-21×=3y=12
21×+3y-3y=12-3y
21×=12-3y
21:(21×) /21=(12-3y) /21
×=(12-3y) /21
×=(12-3y) /21.
Answer: simplify then add the variables from each side to use the elimination method for finding the process of function
Explanation:
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