(6+0.09x)*(300+x)=21+0.07x

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Solution for (6+0.09x)*(300+x)=21+0.07x equation: 



(6+0.09x)(300+x)=21+0.07x

We move all terms to the left:

(6+0.09x)(300+x)-(21+0.07x)=0

We add all the numbers together, and all the variables

(0.09x+6)(x+300)-(0.07x+21)=0

We get rid of parentheses

(0.09x+6)(x+300)-0.07x-21=0

We multiply parentheses ..

(+0x^2+0x+6x+1800)-0.07x-21=0

We get rid of parentheses

0x^2+0x+6x-0.07x+1800-21=0

We add all the numbers together, and all the variables

x^2+6.93x+1779=0

a = 1; b = 6.93; c = +1779;
Δ = b2-4ac
Δ = 6.932-4·1·1779
Δ = -7067.9751
Delta is less than zero, so there is no solution for the equation

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