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x+(6-x)4x=90
We move all terms to the left:
x+(6-x)4x-(90)=0
We add all the numbers together, and all the variables
x+(-1x+6)4x-90=0
We multiply parentheses
-4x^2+x+24x-90=0
We add all the numbers together, and all the variables
-4x^2+25x-90=0
a = -4; b = 25; c = -90;
Δ = b2-4ac
Δ = 252-4·(-4)·(-90)
Δ = -815
Delta is less than zero, so there is no solution for the equation
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