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2/7(21x-14)=3x+11
We move all terms to the left:
2/7(21x-14)-(3x+11)=0
Domain of the equation: 7(21x-14)!=0We get rid of parentheses
x∈R
2/7(21x-14)-3x-11=0
We multiply all the terms by the denominator
-3x*7(21x-14)-11*7(21x-14)+2=0
Wy multiply elements
-21x^2(2-77x(2+2=0
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