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Posted by betty boop on Friday, September 23, 2011 at 7:44pm.

solve this one step by step : 7a-b=15a, for a

Betty or Evelyn -- please use the same name for your posts. I showed you how to do your other problems. Now it's your turn. I'll be glad to check your answer.

7a-b=15a/ 15a-15a=b-15a/ 7/7a=15-b/7 7=a

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