13.5=3x/10+21

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Solution for 13.5=3x/10+21 equation: 



13.5=3x/10+21

We move all terms to the left:

13.5-(3x/10+21)=0

We get rid of parentheses

-3x/10-21+13.5=0

We multiply all the terms by the denominator


-3x-21*10+(13.5)*10=0

We add all the numbers together, and all the variables

-3x-75=0

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

-3x=75

x=75/-3

x=-25

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