(25-x)+(15-x)+x=30

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Solution for (25-x)+(15-x)+x=30 equation: 



(25-x)+(15-x)+x=30

We move all terms to the left:

(25-x)+(15-x)+x-(30)=0

We add all the numbers together, and all the variables

(-1x+25)+(-1x+15)+x-30=0

We add all the numbers together, and all the variables

x+(-1x+25)+(-1x+15)-30=0

We get rid of parentheses

x-1x-1x+25+15-30=0

We add all the numbers together, and all the variables

-1x+10=0

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

-x=-10

x=-10/-1

x=+10

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