x-(20/100)x=120

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Solution for x-(20/100)x=120 equation: 



x-(20/100)x=120

We move all terms to the left:

x-(20/100)x-(120)=0



Domain of the equation: 100)x!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

x-(+20/100)x-120=0

We multiply parentheses

-20x^2+x-120=0

a = -20; b = 1; c = -120;
Δ = b2-4ac
Δ = 12-4·(-20)·(-120)
Δ = -9599
Delta is less than zero, so there is no solution for the equation

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