100+40+30=x+30

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Solution for 100+40+30=x+30 equation: 



100+40+30=x+30

We move all terms to the left:

100+40+30-(x+30)=0

We add all the numbers together, and all the variables

-(x+30)+170=0

We get rid of parentheses

-x-30+170=0

We add all the numbers together, and all the variables

-1x+140=0

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

-x=-140

x=-140/-1

x=+140

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