3=7(4-2u)

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Solution for 3=7(4-2u) equation: 



3=7(4-2u)

We move all terms to the left:

3-(7(4-2u))=0

We add all the numbers together, and all the variables

-(7(-2u+4))+3=0



We calculate terms in parentheses: -(7(-2u+4)), so:

7(-2u+4)

We multiply parentheses

-14u+28

Back to the equation:

-(-14u+28)



We get rid of parentheses

14u-28+3=0

We add all the numbers together, and all the variables

14u-25=0

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

14u=25

u=25/14

u=1+11/14

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