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1/4x(43+63+57+x)=55
We move all terms to the left:
1/4x(43+63+57+x)-(55)=0
Domain of the equation: 4x(43+63+57+x)!=0We add all the numbers together, and all the variables
x∈R
1/4x(x+163)-55=0
We multiply all the terms by the denominator
-55*4x(x+163)+1=0
Wy multiply elements
-220x(x+1=0
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