Math Question

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1

<p>Hi guys i know this is very easy but i got confused because i kinda forgot the rule. In the first problem he used the reciprocal of the fraction and he included the variable! why did he put -1/2x in both sides? please help me out!</p>

<p><a href="http://youtu.be/NVtXA31puVU?t=2m"&gt;http://youtu.be/NVtXA31puVU?t=2m&lt;/a&gt;&lt;/p>

2

<p>He was subtracting (1/2)x from both sides, so that he could get all the variables onto one side. So he ended up with x - (1/2)x -5 = (1/2)x - (1/2)x, and the right side becomes zero. </p>

3

<p>Thank you very much for taking time answering this. I thought it was the reciprocal but it turned out that i was mistaken. </p>