220=(115+x)+(85+x)

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Solution for 220=(115+x)+(85+x) equation: 



220=(115+x)+(85+x)

We move all terms to the left:

220-((115+x)+(85+x))=0

We add all the numbers together, and all the variables

-((x+115)+(x+85))+220=0



We calculate terms in parentheses: -((x+115)+(x+85)), so:

(x+115)+(x+85)

We get rid of parentheses

x+x+115+85

We add all the numbers together, and all the variables

2x+200

Back to the equation:

-(2x+200)



We get rid of parentheses

-2x-200+220=0

We add all the numbers together, and all the variables

-2x+20=0

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

-2x=-20

x=-20/-2

x=+10

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