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OpenStudy (anonymous):
Use mental math to determine the solution to x – 3 = 10
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OpenStudy (cgreenwade2000):
Since it's mental math let's not write it.
OpenStudy (cgreenwade2000):
What do you have to do in that equation to get x alone?
OpenStudy (anonymous):
do what you would do solving for x on paper, in your head. Visualize adding 3 to both sides so that x is alone on one side and 13 is on the other. (10+3)
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