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3/4x+1/4(x+12)-12=4x-21
We move all terms to the left:
3/4x+1/4(x+12)-12-(4x-21)=0
Domain of the equation: 4x!=0
x!=0/4
x!=0
x∈R
Domain of the equation: 4(x+12)!=0We get rid of parentheses
x∈R
3/4x+1/4(x+12)-4x+21-12=0
We calculate fractions
-4x+(12xx/(16x^2x+4x/(16x^2x+21-12=0
We can not solve this equation
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