-12 = x-5 first thing you have to do is get x on one side always you have to get x on one side. (note that what you do to one side you must always do to the other side)
-12 = x-5 x is being subtracted by 5, so to cancel that out you have to add 5, (-5 + 5 =0) but since you added 5 to one side you have to add 5 to the other side
-12+5 = x-5+5 -12+ 5 = -7
-7 = x is your answer
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