(100+x)+(x+20)=20

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Solution for (100+x)+(x+20)=20 equation: 



(100+x)+(x+20)=20

We move all terms to the left:

(100+x)+(x+20)-(20)=0

We add all the numbers together, and all the variables

(x+100)+(x+20)-20=0

We get rid of parentheses

x+x+100+20-20=0

We add all the numbers together, and all the variables

2x+100=0

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

2x=-100

x=-100/2

x=-50

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