4x/5x=7x+8/9x-20

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Solution for 4x/5x=7x+8/9x-20 equation: 



4x/5x=7x+8/9x-20

We move all terms to the left:

4x/5x-(7x+8/9x-20)=0



Domain of the equation: 5x!=0

x!=0/5

x!=0

x∈R





Domain of the equation: 9x-20)!=0

x∈R



We get rid of parentheses

4x/5x-7x-8/9x+20=0

We calculate fractions


36x^2/45x^2-7x+(-40x)/45x^2+20=0

We multiply all the terms by the denominator


36x^2-7x*45x^2+(-40x)+20*45x^2=0

Wy multiply elements

36x^2-315x^3+900x^2+(-40x)=0

We get rid of parentheses

36x^2-315x^3+900x^2-40x=0

We do not support expression: x^3

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