45=3+x

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Solution for 45=3+x equation: 



45=3+x

We move all terms to the left:

45-(3+x)=0

We add all the numbers together, and all the variables

-(x+3)+45=0

We get rid of parentheses

-x-3+45=0

We add all the numbers together, and all the variables

-1x+42=0

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

-x=-42

x=-42/-1

x=+42

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