7x+21=1/3(21x+15)

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Solution for 7x+21=1/3(21x+15) equation: 



7x+21=1/3(21x+15)

We move all terms to the left:

7x+21-(1/3(21x+15))=0



Domain of the equation: 3(21x+15))!=0

x∈R



We multiply all the terms by the denominator


7x*3(21x+15))-(1+21*3(21x+15))=0

Wy multiply elements

21x^2(2+63x(2=0

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