12-18u=u-15u-12

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Solution for 12-18u=u-15u-12 equation: 



12-18u=u-15u-12

We move all terms to the left:

12-18u-(u-15u-12)=0

We add all the numbers together, and all the variables

-18u-(-14u-12)+12=0

We get rid of parentheses

-18u+14u+12+12=0

We add all the numbers together, and all the variables

-4u+24=0

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

-4u=-24

u=-24/-4

u=+6

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