document.write( "Question 943678: Anne solved 5(2x)- 3 = 20x + 15 for x by first distributing 5 on the left side of the equation. She got the answer x = -3. However, when she substituted -3 into the original situation for x, she saw that her answer was wrong. What did Anne do wrong, and what is the correct way? \n" ); document.write( "

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Anne solved 5(2x)- 3 = 20x + 15 for x by first distributing 5 on the left side of the equation. She got the answer x = -3. However, when she substituted -3 into the original situation for x, she saw that her answer was wrong. What did Anne do wrong, and what is the correct way?
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She seemed to have distributed the 5 on the entire left side of the equation instead of only distributing
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document.write( "the 5 to the 2x. This is what she might've done:
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document.write( "5(2x - 3) = 20x + 15
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document.write( "10x - 15 = 20x + 15
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document.write( "10x - 20x = 15 + 15
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document.write( "- 10x = 30
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document.write( ", or \r
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document.write( "Correct solution, since she was wrong, as well as the person who responded:
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document.write( "5(2x) - 3 = 20x + 15
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document.write( "10x - 3 = 20x + 15
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document.write( "10x - 20x = 15 + 3
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document.write( "- 10x = 18
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document.write( ", or , or        
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document.write( "You can do the check!! 
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