If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
2*x+15 = 0
2*x+15 = 0
2*x+15 = 0
2*x+15 = 0 // - 15
2*x = -15 // : 2
x = -15/2
x in (-oo:-15/2) U (-15/2:+oo)
(180*x)/(2*x+15) = y // - y
(180*x)/(2*x+15)-y = 0
(180*x)/(2*x+15)+(-y*(2*x+15))/(2*x+15) = 0
180*x-y*(2*x+15) = 0
180*x-2*x*y-15*y = 0
180*x-2*x*y-15*y = 0
-2*x*y-15*y = 0 // + -15*y
-2*x*y = -(-15*y) // : -2*y
x = (-(-15*y))/(-2*y)
x = -15/2
x+15/2 = 0
(x+15/2)/(2*x+15) = 0
(x+15/2)/(2*x+15) = 0 // * 2*x+15
x+15/2 = 0
x+15/2 = 0 // - 15/2
x = -15/2
x in { -15/2}
x belongs to the empty set
| 106=x^4 | | 180x/(15+2x) | | 30x^12/36x^5 | | -15=6p+15-4p | | (22/16)^2 | | x^2+10x-66=0 | | x+2=(-10) | | -6/7(6x+4)=1/28x-15 | | 0.25x+0.75x=0.8+3.5 | | 1.25=x^4 | | 12--3= | | 30-10(2/5) | | 12-13= | | 12-15= | | 2.7m+3.8=7.8-9.8m | | 12--8= | | 30-102/5 | | -11--3= | | -11-13= | | 4.38-0.15x=1.15x+2.57 | | -11-15= | | -11--8= | | 8/36+23/36 | | 2(8-x)=564 | | 4--3= | | 4-13= | | x+6=(-4) | | (9/4-1/2)/(9/5) | | -0.11(3a+5)=0.37(2a-1) | | y=50+40z | | (1/3x*2)+(x/9x*2-12x) | | 8x^3=-64 |