If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
10-x = 0
10-x = 0
10-x = 0
10-x = 0 // - 10
-x = -10 // * -1
x = 10
x in (-oo:10) U (10:+oo)
782.2 = 7040/(10-x) // - 7040/(10-x)
782.2-(7040/(10-x)) = 0
782.2-7040*(10-x)^-1 = 0
782.2-7040/(10-x) = 0
(782.2*(10-x))/(10-x)-7040/(10-x) = 0
782.2*(10-x)-7040 = 0
782-782.2*x = 0
(782-782.2*x)/(10-x) = 0
(782-782.2*x)/(10-x) = 0 // * 10-x
782-782.2*x = 0
782-782.2*x = 0 // - 782
-782.2*x = -782 // : -782.2
x = -782/(-782.2)
x = 0.99974431
x = 0.99974431
| -2+12=y | | 4x-6x+29=3x+34 | | 880=7040/(10-x) | | 2(1)-y=-1 | | 5(X-6)+2(3X-5)=4-2(4X+3) | | 18=432/(19+x) | | 19.6=432/(19+x) | | 1/2x+6=-4 | | 1-(3/4x)=1/2x | | 2t+5=45 | | 0.3803=27/(27+x) | | 3-(3/8x)=1/4x | | 3-(3/8x)=1/4x+3/8x | | X+8-4=9 | | 0.5094=27/(27+x) | | 6/5(2)=y | | 4x^2-19x-30/36-x^2 | | -2(8r+5)= | | 12x=696969 | | 2+4(5x-7)=46 | | 12/5+24=y | | 3(2X+9)-5(4X-11)=8(11-X) | | 21(n/7)=21(n/3+8/21) | | 21(n/3) | | (x^2+8x+16)/(x^2-2x-24) | | 7/x^2-36-1/x-6 | | -6/5(-2)=y | | 21(n/7) | | 2.04=55/(24+x) | | 3x+2=2(x-1) | | 6/3m+6+3/m+2 | | 3(-1)-2y=4 |