(x+15)+x=(4x-20)

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Solution for (x+15)+x=(4x-20) equation: 



(x+15)+x=(4x-20)

We move all terms to the left:

(x+15)+x-((4x-20))=0

We add all the numbers together, and all the variables

x+(x+15)-((4x-20))=0

We get rid of parentheses

x+x-((4x-20))+15=0



We calculate terms in parentheses: -((4x-20)), so:

(4x-20)

We get rid of parentheses

4x-20

Back to the equation:

-(4x-20)



We add all the numbers together, and all the variables

2x-(4x-20)+15=0

We get rid of parentheses

2x-4x+20+15=0

We add all the numbers together, and all the variables

-2x+35=0

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

-2x=-35

x=-35/-2

x=17+1/2

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