85-x=100+x

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Solution for 85-x=100+x equation: 



85-x=100+x

We move all terms to the left:

85-x-(100+x)=0

We add all the numbers together, and all the variables

-x-(x+100)+85=0

We add all the numbers together, and all the variables

-1x-(x+100)+85=0

We get rid of parentheses

-1x-x-100+85=0

We add all the numbers together, and all the variables

-2x-15=0

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

-2x=15

x=15/-2

x=-7+1/2

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