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(x+30)+(x+25)=x
We move all terms to the left:
(x+30)+(x+25)-(x)=0
We add all the numbers together, and all the variables
-1x+(x+30)+(x+25)=0
We get rid of parentheses
-1x+x+x+30+25=0
We add all the numbers together, and all the variables
x+55=0
We move all terms containing x to the left, all other terms to the right
x=-55
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