If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
15/m = m/5 // - m/5
15/m-(m/5) = 0
15*m^-1-1/5*m^1 = 0
(15*m^0-1/5*m^2)/(m^1) = 0 // * m^2
m^1*(15*m^0-1/5*m^2) = 0
m^1
(-1/5)*m^2+15 = 0
(-1/5)*m^2+15 = 0
DELTA = 0^2-(4*15*(-1/5))
DELTA = 12
DELTA > 0
m = (12^(1/2)+0)/(2*(-1/5)) or m = (0-12^(1/2))/(2*(-1/5))
m = -5*3^(1/2) or m = 5*3^(1/2)
m in { -5*3^(1/2), 5*3^(1/2)}
m in { -5*3^(1/2), 5*3^(1/2) }
| 3-3u=12 | | -3/4x-5/8=-5/8x-3/4 | | 5n+8=90 | | 1/2(15+7d)=-d/7 | | 5x+13=10x-7 | | 1.4m-0.6(m-2)=2 | | (4/5)/12 | | 2-3x=4x-75 | | 1800-60x+1200-45x=c | | 7x+5=-19 | | x(3x)= | | x/3+x=4 | | 300-2p=100+5p | | x-6=-1+3 | | A=1/22015 | | 12(4/5) | | 9-12/5 | | 30+8v+4v-19=20v+16-8v-5 | | 8/(2/3) | | 3x^3-12= | | -4x-1-4x=-33 | | W-15=l | | 6/(3/8) | | 1/6(2x-112)=5x | | 91(-7)-5=35/7+3 | | 8y-7=7y | | (2p+3)-1-3=-4 | | 3--2t=19 | | 6=2r-6+2r | | (3/8)/6 | | 5=15-5/6(5y+8) | | 1/5(2x-112)=5x |