81=1.8x

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Solution for 81=1.8x equation: 



81=1.8x

We move all terms to the left:

81-(1.8x)=0

We add all the numbers together, and all the variables

-(+1.8x)+81=0

We get rid of parentheses

-1.8x+81=0

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

-1.8x=-81

x=-81/-1.8

x=+45

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