If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( n )
n = 0
n = 0
n = 0
n in (-oo:0) U (0:+oo)
180*(n-2) = 15*(360/n) // - 15*(360/n)
180*(n-2)-(15*(360/n)) = 0
180*(n-2)-5400*n^-1 = 0
180*(n-2)-5400/n = 0
(180*n*(n-2))/n-5400/n = 0
180*n*(n-2)-5400 = 0
180*n^2-360*n-5400 = 0
180*n^2-360*n-5400 = 0
180*(n^2-2*n-30) = 0
n^2-2*n-30 = 0
DELTA = (-2)^2-(-30*1*4)
DELTA = 124
DELTA > 0
n = (124^(1/2)+2)/(1*2) or n = (2-124^(1/2))/(1*2)
n = (2*31^(1/2)+2)/2 or n = (2-2*31^(1/2))/2
180*(n-((2-2*31^(1/2))/2))*(n-((2*31^(1/2)+2)/2)) = 0
(180*(n-((2-2*31^(1/2))/2))*(n-((2*31^(1/2)+2)/2)))/n = 0
(180*(n-((2-2*31^(1/2))/2))*(n-((2*31^(1/2)+2)/2)))/n = 0 // * n
180*(n-((2-2*31^(1/2))/2))*(n-((2*31^(1/2)+2)/2)) = 0
( n-((2*31^(1/2)+2)/2) )
n-((2*31^(1/2)+2)/2) = 0 // + (2*31^(1/2)+2)/2
n = (2*31^(1/2)+2)/2
( n-((2-2*31^(1/2))/2) )
n-((2-2*31^(1/2))/2) = 0 // + (2-2*31^(1/2))/2
n = (2-2*31^(1/2))/2
n in { (2*31^(1/2)+2)/2, (2-2*31^(1/2))/2 }
| (180(n-2))/n=15(360/n) | | X^2+x/6=99 | | (18/2)-1=a | | (18)/(x)=(x+9)/(x-1) | | 9x+3y=17 | | (17x-15-36)/12=0 | | (17/x)=4 | | (17/16)x=13 | | (17/(4x))+(2/7)=(9/(4x)) | | (17.75+x)/2=8.75 | | (17-y)/3=5+(49+2y)/5 | | (17-x)/(2)=(49+2x)/(4)+5 | | (16X/8)=X-7 | | (16x-7)/(8x+3)=2-(6/x) | | (16x-25)(4/5)=32 | | (16x-24)(4/5)=32 | | (165+x)/3=75 | | (16/17)=(x/40) | | (16-6y-z/3)+3y+2=9 | | (16-3*5)q+13=(2*9-16)q+(12/12-1) | | x+x+x+9=0 | | (16+X)/12=8/3 | | (15y-5)/(3Y-1)=5 | | (15x)/9=2x+4 | | (15x)/(8)+(3)/(4)=2x | | (15x)/(56x)=1/2 | | 5t-3t=5-3t+15 | | (15t/5)=(2t+3)/6 | | 4x-2+6x-25=113 | | (15n+12+24)/(n+2)=16 | | xy+z=wy+x | | (15c+30)=1/3(102-12c) |