If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x-(19/x)-20 > 3 // - 3
x-(19/x)-20-3 > 0
x-19*x^-1-20-3 > 0
x-19*x^-1-20-3 = 0
1*x^1-19*x^-1-23*x^0 = 0
(1*x^2-23*x^1-19*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2-23*x^1-19*x^0) = 0
x^1
x^2-23*x-19 = 0
x^2-23*x-19 = 0
DELTA = (-23)^2-(-19*1*4)
DELTA = 605
DELTA > 0
x = (605^(1/2)+23)/(1*2) or x = (23-605^(1/2))/(1*2)
x = (11*5^(1/2)+23)/2 or x = (23-11*5^(1/2))/2
x in { (23-11*5^(1/2))/2, (11*5^(1/2)+23)/2}
(x-((23-11*5^(1/2))/2))*(x-((11*5^(1/2)+23)/2)) > 0
(-oo:(23-11*5^(1/2))/2) ((23-11*5^(1/2))/2:(11*5^(1/2)+23)/2) ((11*5^(1/2)+23)/2:+oo) x-((23-11*5^(1/2))/2) - + + x-((11*5^(1/2)+23)/2) - - +
x in (-oo:(23-11*5^(1/2))/2) U ((11*5^(1/2)+23)/2:+oo)
(-oo:(23-11*5^(1/2))/2) U ((11*5^(1/2)+23)/2:+oo)
| h(x)=3*-5+5 | | 6(j+434)=984 | | x^2+5x+5x+24=0 | | (3x-5)x=0 | | 19(r+954)=266 | | y=26-4*6 | | y=26-4*5 | | x+8=1008 | | r^2+10r+35=0 | | y=26-4*4 | | 7x-9=7(x-1)-2 | | 20/14=90/t | | y=26-4*2 | | T^2=4t+6 | | y=26-42 | | y-12=2x^2+8x+8 | | 19b-(-29)=352 | | 2x+14=5+2x+(x+3) | | x*2+14=5+2x+(x+3) | | 3+5u=-32 | | 11+r=9x-4 | | x+21=5+2x+(x+3) | | 6x^2-12x-33=3 | | -12=2v-4 | | 9(k+4)=81 | | x*7=5+2x+(x+3) | | 2/5(10x-10y)-3/4(12x-24y)= | | 6*7=5+2x+(x+3) | | 72=2(t-26) | | 6x-10=2x+5+3(x-5) | | 4X-y=-27 | | 100x^2+2100x-10000=0 |