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1/4(20-40a)=6-a
We move all terms to the left:
1/4(20-40a)-(6-a)=0
Domain of the equation: 4(20-40a)!=0We add all the numbers together, and all the variables
a∈R
1/4(-40a+20)-(-1a+6)=0
We get rid of parentheses
1/4(-40a+20)+1a-6=0
We multiply all the terms by the denominator
1a*4(-40a+20)-6*4(-40a+20)+1=0
Wy multiply elements
4a^2(--24a(-+1=0
We use the square of the difference formula
4a^2(+24a(-1=0
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