21=x/4-13

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Solution for 21=x/4-13 equation: 



21=x/4-13

We move all terms to the left:

21-(x/4-13)=0

We get rid of parentheses

-x/4+13+21=0

We multiply all the terms by the denominator


-x+13*4+21*4=0

We add all the numbers together, and all the variables

-1x+136=0

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

-x=-136

x=-136/-1

x=+136

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