x+4=13x-21

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Solution for x+4=13x-21 equation: 



x+4=13x-21

We move all terms to the left:

x+4-(13x-21)=0

We get rid of parentheses

x-13x+21+4=0

We add all the numbers together, and all the variables

-12x+25=0

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

-12x=-25

x=-25/-12

x=2+1/12

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