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anonymous
 one year ago
Marcie solved the following inequality, and her work is shown below:
−2(x − 5) − 12 ≤ 4 + 6(x + 3)
−2x + 10 − 12 ≤ 4 + 6x + 18
−2x − 2 ≤ 6x + 22
−8x ≤ 24
x ≤ −3
What mistake did Marcie make in solving the inequality?
She subtracted 6x from both sides when she should have added 2x.
She added 2 to both sides when she should have subtracted 22.
When dividing by −8, she did not change the ≤ to ≥.
She did not make a mistake.
anonymous
 one year ago
Marcie solved the following inequality, and her work is shown below: −2(x − 5) − 12 ≤ 4 + 6(x + 3) −2x + 10 − 12 ≤ 4 + 6x + 18 −2x − 2 ≤ 6x + 22 −8x ≤ 24 x ≤ −3 What mistake did Marcie make in solving the inequality? She subtracted 6x from both sides when she should have added 2x. She added 2 to both sides when she should have subtracted 22. When dividing by −8, she did not change the ≤ to ≥. She did not make a mistake.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0There isn't a mistake as far as I can see... Just imagine inequality signs as equal signs  they never change their position and don't really matter when you're solving the problem.

marigirl
 one year ago
Best ResponseYou've already chosen the best response.1−2(x − 5) − 12 ≤ 4 + 6(x + 3) −2x + 10 − 12 ≤ 4 + 6x + 18 Correct −2x − 2 ≤ 6x + 22 simplified correctly −8x ≤ 24 correct x ≤ −3 * incorrect when dividing both sides by a negative integer the sign will reverse 

marigirl
 one year ago
Best ResponseYou've already chosen the best response.1Whenever you multiply or divide an inequality by a negative number, you must flip the inequality sign.
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