3=x+2=7

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Solution for 3=x+2=7 equation: 



3=x+2=7

We move all terms to the left:

3-(x+2)=0

We get rid of parentheses

-x-2+3=0

We add all the numbers together, and all the variables

-1x+1=0

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

-x=-1

x=-1/-1

x=1

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