If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n in (-oo:+oo)
(3/5)*(5*n-15) = 0
3/5*(5*n-15) = 0
( 3/5 )
3/5 = 0
n belongs to the empty set
( 5*n-15 )
5*n-15 = 0 // + 15
5*n = 15 // : 5
n = 15/5
n = 3
n = 3
| -20=-40-6x | | 1/4(8p-20) | | -6(x+5)-7=7(x+3) | | 8.5x=-7.6 | | 1/4(8p-20 | | x=(a^2)x+4a-3ax-12 | | 3/2(4m-8) | | 8i(14-9i)=0 | | 3x/5=6x/8 | | 0+10y=7 | | 29p^2+10p=-10p^3 | | 2(-5p-8)=2-7p | | 3-x/8=2 | | 3-x/8-2 | | -4(1+5k)-7(k-5)=-50 | | 5/6(12r-6) | | 5/6(1-x)=-x-1 | | -3m^3+3m^2=-36m | | 3(4x-7)=-129 | | -15+m=-19 | | 3+8s-5c= | | |x-2|=-2 | | -2(7+3x)=-14 | | -3/4(8p-12) | | 3a+2b-8+b= | | -3r+5=7 | | 2(4x+1)=-54 | | 6x+3=4r+11 | | -4(5x-6)=-16 | | 2/3x-32/3-7 | | 2(10+7x)=188 | | -4n-6=-2(1-3n) |