18=7x-5+8-x2

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Solution for 18=7x-5+8-x2 equation: 



18=7x-5+8-x2

We move all terms to the left:

18-(7x-5+8-x2)=0

We add all the numbers together, and all the variables

-(+7x-1x^2-5+8)+18=0

We get rid of parentheses

1x^2-7x+5-8+18=0

We add all the numbers together, and all the variables

x^2-7x+15=0

a = 1; b = -7; c = +15;
Δ = b2-4ac
Δ = -72-4·1·15
Δ = -11
Delta is less than zero, so there is no solution for the equation

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