(60+x)+(40+x)+(20+x)=360

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Solution for (60+x)+(40+x)+(20+x)=360 equation: 



(60+x)+(40+x)+(20+x)=360

We move all terms to the left:

(60+x)+(40+x)+(20+x)-(360)=0

We add all the numbers together, and all the variables

(x+60)+(x+40)+(x+20)-360=0

We get rid of parentheses

x+x+x+60+40+20-360=0

We add all the numbers together, and all the variables

3x-240=0

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

3x=240

x=240/3

x=80

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