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*n+5/7 = 0
3*n+5/7 = 0 // - 5/7
3*n = -5/7 // : 3
n = -5/7/3
n = -5/21
n = -5/21
| x^3+10x^2+30x+36=0 | | 16-R=11 | | (3t+5)+(9+t)+1= | | 4y=20x-24 | | 10(6.85j+7.654)=0 | | 10x^6+26x^5-12x^4=0 | | 5y=x+15 | | 38=26y-7x | | 4a+5=3+2a | | 10(6.8j+7.654)=0 | | 5y-7=-37 | | (7x^2+7x-3x^4)+(7x-8x^4-6x^2)= | | 17x-7=8+12x | | -5=25x+55 | | .3x=5.25 | | 4y^4+22y^3+10y^2=0 | | -9y=6x+9 | | (-5x-14)(5.1)=0 | | 5kx^2-10kx+1=0 | | (X^2+2x+3)/((X^2+3)(X^2+3))=0 | | 5.5(2x+8)=4(6x-2) | | X/7=11/35 | | 1/3(3z+12) | | (X^2+2x+3)/((X^2+3)(X^2+3)) | | 4x-30=60x-35 | | (X^2+2x+3)/(X^2+3)(X^2+3) | | 1200x^2+2400x-123=0 | | 2t^5(t-t^2+7t^3)= | | (7p+2t)/s=n | | 30x+30=36x-18 | | (x-2-2i)(x-2+2i)=0 | | 2/5t+21=15 |