3x-1=4(5-x)

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Solution for 3x-1=4(5-x) equation: 



3x-1=4(5-x)

We move all terms to the left:

3x-1-(4(5-x))=0

We add all the numbers together, and all the variables

3x-(4(-1x+5))-1=0



We calculate terms in parentheses: -(4(-1x+5)), so:

4(-1x+5)

We multiply parentheses

-4x+20

Back to the equation:

-(-4x+20)



We get rid of parentheses

3x+4x-20-1=0

We add all the numbers together, and all the variables

7x-21=0

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

7x=21

x=21/7

x=3

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