(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+15+20=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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