If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
-12/w = -4 // + 4
4-12/w = 0
-12*w^-1 = -4 // : -12
w^-1 = 1/3
-1 < 0
1/(w^1) = 1/3 // * w^1
1 = 1/3*w^1 // : 1/3
3 = w^1
w = 3
w = 3
| -16=62+13y | | -14+11m=13m | | 7a+b+0c+3d=100 | | -6(2u-4)+5u=5(u+2) | | 6x-5x+14=14-5 | | 4x+x=2200 | | 2+3c=2c+6+c | | -11b=-9b+8 | | 24x-3=24+3x | | 4(h-6)=3 | | z-7=-11 | | 9x-3+51=180 | | 2.6z-12+3.2x=46 | | 5d-4d=2 | | -7x-2y=17 | | http://homework.cpm.org/cpm-homework/resources/CPM/CC/CCA/Ch5/5-104/97964571268417399373617819802537783878923129310305789413114070431128883639069/104a.png | | 20+12w=11w | | 2x-8(3-x)=5-x | | 15n-15=20n | | -7x-2x=17 | | 8x+13+3x=360 | | 2.6z+12+3.2x=46 | | 8a-11a=18 | | 0=x^2-4x-20 | | 19y-12y=-7 | | 8x+13+3x=180 | | 19-12y=-7 | | y=4.50x | | V-1/1/3=1/4/5 | | 5-r=15 | | 8x+13=3x | | 12x+5=5x(x-7)-3x |