If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
4*x-12 = 0
4*x-12 = 0
4*x-12 = 0
4*x-12 = 0 // + 12
4*x = 12 // : 4
x = 12/4
x = 3
x in (-oo:3) U (3:+oo)
(4*x-9)/(4*x-12) = 0
4*x-9 = 0 // + 9
4*x = 9 // : 4
x = 9/4
x = 9/4
| -1.2(9.3)= | | (-4m+2)(-4m+2)-17=11 | | 5[y-2]-10=4[4y-2]-3 | | (-1/2)-(3/4)= | | p+15-28+5=177 | | 3*t=24 | | -104/(-13) | | -1(5x+9)=-24 | | (4/49)(4-4x+x^2)-x=0 | | 6x-(3y)=9 | | K=2yz | | -14/-7/2 | | 8-2x=x+7 | | [p-7]=3 | | Log(2x+325)=4 | | (-70+-3b)+b+b+b+80+90=100 | | 6/5k-2k+2/5+2/5k-6 | | 5/8x*1/16x=9/16+x | | 0.25y-0.4=0.15y+2-0.5 | | 12-0.8y=26+0.6y | | (4r)^1/2(3r^1/3) | | 6(1-3x)+4(5x)=26 | | 6x^2+15x+16=0 | | 4m-19=8+7m | | x/2-11=110 | | 3=n-10+9n-3 | | 15.7=2(3.14)(r) | | x-0.8=8.36 | | 20-b+8=24 | | 18=3x+1+1/2x+3 | | u^5-16u=0 | | 5x-7x+4=16 |