Sandra worked 6 hours on Wednesday, 5 hours on Thursday, and 4 hours on Friday. What is the mean number of hours she worked over
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The answer is
First you must use distributive property to simplify.
Then, you must subtract 18 on both sides
Next, add 2 on both sides
Then, subtract 8x on both sides
Finally, Divide both sides by -2. Don't forget to switch the equality sign because the variable was changed to a positive using division.