u/4+8=21

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Solution for u/4+8=21 equation: 



u/4+8=21

We move all terms to the left:

u/4+8-(21)=0

We add all the numbers together, and all the variables

u/4-13=0

We multiply all the terms by the denominator


u-13*4=0

We add all the numbers together, and all the variables

u-52=0

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

u=52

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