Byron S. answered • 10/20/14
Tutor
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Math and Science Tutor with an Engineering Background
If you're trying to solve this equation for u, then you need to "get rid" of the 12, and the -1/3. You do this in reverse order of operations, so we need to undo the 12 first.
12 - 1/3 u = 2
-12 -12
-1/3 u = -10
-1/3 * u on the left we need to undo the multiplication by -1/3. The easiest way to do this with a fraction is to multiply by the reciprocal of the fraction. -1/3 -> -3
-3( -1/3 u ) = -3 ( -10 )
u = -30
