SOLUTION: 7-10a=9-9a

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Question 680360: 7-10a=9-9a
Answer by ReadingBoosters(3246) About Me  (Show Source):
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Group the variables on one side
-10a + 9a = 9 - 7
...
-a = 2
Divide both sides by -1
highlight_green%28a=-2%29
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