If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
27*x = 0
9*x = 0
27*x = 0
27*x = 0
27*x = 0 // : 27
x = 0
9*x = 0
9*x = 0
9*x = 0 // : 9
x = 0
x in (-oo:0) U (0:+oo)
((16/(9*x))/2)/(27*x) = 0
8/243*x^-2 = 0 // : 8/243
x^-2 = 0
x należy do O
x belongs to the empty set
| 25x+30y=970 | | -3/4*-8x*4/3*4y*1= | | 81+3x=6 | | -10+5x=4x+2 | | -10x+5x=4x+2 | | (6x+2)=141 | | (6x+3)=141 | | (5x)=141 | | b=18+y | | 56+5x+13=2x^2-14X+9 | | (5x)+(6x+3)+(6x+2)=141 | | y-5+2y=1 | | 20sin(10x)-10=5 | | 122-57/57*100 | | (x+4y)=3 | | -16x-4(x(x))=-420 | | -(-6u-y)+5(-y-u)= | | 0.3x-6=1.1x-18 | | Y=-14+1x | | -6x+4y=15 | | (-1/3,-3/4) | | 5sin(x)=8cos(x) | | -3(x-9)=-9x+21 | | 6u-30=-6(u-7) | | .75x+1.5y=15 | | 5-4x=-3-5 | | 5b=x+3b | | 1-2y=y-5 | | 0-2k=2k | | -2(a-5)=30 | | 5x-3/1.(1/2-x)=4 | | 4k=8k |