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 = x-((5/x)*x)-16 // - x-((5/x)*x)-16
x-x+(5/x)*x+16 = 0
21 = 0
x belongs to the empty set
x belongs to the empty set
| =2x^2+x-5 | | 4x+12y=12 | | (2x+3)(x+7)=0 | | 2y=300 | | (4+w)(2w+7)=0 | | x-1=5x+2 | | 6(8t+20)=8(6t+15) | | -(2c-4)=2c-4 | | (s+2)(s-5)=44 | | 0.1x-0.2y=4 | | 6(k+1)=5k | | (x-1)/21x^2*7x/6*12x^3/(x-1)^2 | | 4X/5+10=3X-12 | | 2/3+3/8 | | 378/x=9 | | 3y/5-1/10= | | 0.02x+0.01y=-0.44 | | (4/9+4/7) | | (d+7)(d+1)=5 | | 0.02x+0.01=-0.44 | | 67*6/6.4*6.4 | | (4/9+4/7)x^5 | | 6/7=14/3x+4 | | 3y-12=-18+4y | | 0.73+0.11t=2.31t-0.15 | | 0.73+0.11t=2.31-0.15 | | 3x+2=5x-39 | | 13/5+4y=8y-1/15 | | -x^2-7x+5= | | 6x+8=5x+10 | | (5w+4)(5+w)=0 | | 5y-4=6z+6 |