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-70)/x = 0.6 // - 0.6
(x-70)/x-0.6 = 0
(x-70)/x+(-0.6*x)/x = 0
x-0.6*x-70 = 0
0.4*x-70 = 0
(0.4*x-70)/x = 0
(0.4*x-70)/x = 0 // * x
0.4*x-70 = 0
0.4*x-70 = 0 // + 70
0.4*x = 70 // : 0.4
x = 70/0.4
x = 175
x = 175
| (x-70)/x=0.7 | | (x-70)/x=0.3 | | 8/5*4-3 | | ((2/x)^0.5-(x/2)^0.5)^2 | | -4x^2+6x=9 | | x=(4x+166)-790 | | 5x+5=6x+7 | | 9C=5F-169 | | 5y-(20-y)3=68 | | SinX-4x+8=1 | | -4.2x+5=-5x+4.8 | | 5/8-5/6 | | 6x+1+1y= | | 1x^2+6x+5=0 | | 14/5-1/10 | | 69/49 | | 0.3(30)+.15x=0.2(30+x) | | 2=1+3 | | 4(2x-1)+3(x+7)=9x+25 | | 3=3-2 | | 3/2*1/6 | | 7x+3y+7z-3x+4z-6y= | | 2x+7y=14whatisy | | 5x-4/2-10x+16/5= | | 6x+4y-8= | | 6x+8y=1 | | t^4+2t^2-2t=-1 | | t^4+1t^2-2t=-1 | | 2x(3+2)= | | 6x-12+3x=0 | | (8x+9)+(-12x+2)= | | z^2+4iz-2i-4=0 |