3(7-z)/z=-z

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Solution for 3(7-z)/z=-z equation: 



3(7-z)/z=-z

We move all terms to the left:

3(7-z)/z-(-z)=0



Domain of the equation: z!=0

z∈R



We add all the numbers together, and all the variables

3(-1z+7)/z-(-1z)=0

We get rid of parentheses

3(-1z+7)/z+1z=0

We multiply all the terms by the denominator


3(-1z+7)+1z*z=0

We multiply parentheses

-3z+1z*z+21=0

Wy multiply elements

z^2-3z+21=0

a = 1; b = -3; c = +21;
Δ = b2-4ac
Δ = -32-4·1·21
Δ = -75
Delta is less than zero, so there is no solution for the equation

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