138=7x+54

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Solution for 138=7x+54 equation: 



138=7x+54

We move all terms to the left:

138-(7x+54)=0

We get rid of parentheses

-7x-54+138=0

We add all the numbers together, and all the variables

-7x+84=0

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

-7x=-84

x=-84/-7

x=+12

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