12u-4u=72

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Solution for 12u-4u=72 equation: 



12u-4u=72

We move all terms to the left:

12u-4u-(72)=0

We add all the numbers together, and all the variables

8u-72=0

We move all terms containing u to the left, all other terms to the right

8u=72

u=72/8

u=9

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