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)
3/x = 9/7 // - 9/7
3/x-(9/7) = 0
3/x-9/7 = 0
3*x^-1 = 9/7 // : 3
x^-1 = 3/7
-1 < 0
1/(x^1) = 3/7 // * x^1
1 = 3/7*x^1 // : 3/7
7/3 = x^1
x = 7/3
x = 7/3
| 2z/7-7=10 | | (X+15)+(x+10)=180 | | 25j^2+10j+1=0 | | 300=-0.005q^2+2.5q | | 9g=10g+6 | | .7d-15+d=2d-8-.4d | | l-3=9 | | 2(3x+4)=14-3(x-1) | | X^2-13y^2=-1 | | 7a^2x1/9= | | 20+20*0+1= | | 2x-3=-(4x-9) | | -4(9-f)=36 | | .42-.03c=33.3-c | | 2n+2.9=5.5 | | .2(12)+.5x=.1(12+x) | | x^2+9y^2=2 | | d^2+8d-33=0 | | 2x+12=-2x-(8) | | x^3-5x^2-9x+45= | | r=6(b+a) | | 1.02(1.23)(7-x)=8 | | 100/x-10=15 | | =20x^4-100x^3-120x^2 | | 10(x+3)=40 | | 2x-3=-(4x-15) | | 100/x-10 | | 3=4x+103 | | 3b-2g+4b+7b= | | 9k^3x+36k^2x^2+36kx^3=0 | | 2x+12=-2x-8 | | .8(1+.5x)=.1(12+x) |