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0.55=1.6x/0.4x+1.2
We move all terms to the left:
0.55-(1.6x/0.4x+1.2)=0
Domain of the equation: 0.4x+1.2)!=0We get rid of parentheses
x∈R
-1.6x/0.4x-1.2+0.55=0
We multiply all the terms by the denominator
-1.6x-(1.2)*0.4x+(0.55)*0.4x=0
We multiply parentheses
-1.6x-0x+0x=0
We add all the numbers together, and all the variables
-1.6x=0
x=0/-1.6
x=0
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