129=x+45

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Solution for 129=x+45 equation: 



129=x+45

We move all terms to the left:

129-(x+45)=0

We get rid of parentheses

-x-45+129=0

We add all the numbers together, and all the variables

-1x+84=0

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

-x=-84

x=-84/-1

x=+84

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