If it's not what You are looking for type in the equation solver your own equation and let us solve it.
i in (-oo:+oo)
(1/7-((1*i)/5))*((2*i)/5+1/14) = 0
(1/7-(i/5))*((2*i)/5+1/14) = 0
(1/7-1/5*i)*(2/5*i+1/14) = 0
( 1/7-1/5*i )
1/7-1/5*i = 0 // - 1/7
-1/5*i = -1/7 // : -1/5
i = -1/7/(-1/5)
i = 5/7
( 2/5*i+1/14 )
2/5*i+1/14 = 0 // - 1/14
2/5*i = -1/14 // : 2/5
i = -1/14/2/5
i = -5/28
i in { 5/7, -5/28 }
| 9r^2+60r-900=0 | | 300-40/x=140 | | 14-5x=x | | 5/2-p=7/4 | | 17+b/8=13 | | 9/10/1/8*9/2 | | (3m/m-2)-(m-3/m+4) | | 9/10/1/8 | | 2m^2=20 | | 7-11=z/-9 | | w*10*10=28.8 | | 5x+3x-x=25 | | 46=-6/t-8 | | 6y-3x=-3 | | 8n-9m=-77 | | 1/3x^2-25/9x-2/1=0 | | 40=200-20z | | d=ut+0.5at^2 | | g^2-3g-4=0 | | 5k^2+3k-14=0 | | c/4+9=-5 | | x(x+6)=6(x+6) | | -2x+3y=36 | | y+8=(-6) | | x^2-2x-18=4x+9 | | 7x-11=-19+-3 | | -3+p/7=-13 | | 23(1/9)-11(7/15) | | 60%*n=75 | | 231/9-117/15 | | 4x^2+25-18x=0 | | 20%*x=24 |