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)
7/5 = 63/x // - 63/x
7/5-(63/x) = 0
7/5-63*x^-1 = 0
-63*x^-1 = -7/5 // : -63
x^-1 = 1/45
-1 < 0
1/(x^1) = 1/45 // * x^1
1 = 1/45*x^1 // : 1/45
45 = x^1
x = 45
x = 45
| 3p^3-21p^2-90p=0 | | 6x-7=27x+7 | | 7x-14=12+3x | | 3+-1x+2=3 | | 3(x+7)=2x-1 | | u/6-2=-5 | | 7/5=x/63 | | 63m^2-31-10=0 | | 59+x=235 | | 1+1/6p=2(p-5) | | 5h+2h+2h=7h | | ((x*3)+7)*4=17x+(3t-7) | | v/-2-(-5)=11 | | -7(a+1)= | | 9d-47=22 | | -174+x=12x+90 | | 40x/10=28 | | 14x-6t=19-(x+t) | | 45x=6y | | 6a^4b^3/30a^2b^5 | | 4x+17=8x+4 | | -0.8x=-0.56 | | x^2+y^2-8x+10y=15 | | m-5.8=-5.87 | | -200x+25000=300x+10000 | | x^2+4x+42=0 | | 2/3=x/140 | | 7r=-38 | | 2.6*0.9=x | | 10x^2+16x+6=0 | | 8y+6=50 | | 3x+4-12x-3=-9x+1 |