If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
(3/5)*a+4 = -13/5 // + -13/5
(3/5)*a-(-13/5)+4 = 0
(3/5)*a+13/5+4 = 0
3/5*a+33/5 = 0 // - 33/5
3/5*a = -33/5 // : 3/5
a = -33/5/3/5
a = -11
a = -11
| -13x=91 | | 6+6b=28/3 | | 1+6/7k=1 | | 2/5+7n=37/5 | | 1+3x=-35 | | 5+2/7a=183/35 | | 7t-3=60 | | 3/5b-7/10=-6/5 | | -3/5-6x=-18/5 | | -7+1/2w=-37/5 | | 2t-10=-6 | | 3/4+3t=-81/4 | | 4/5+6/7t=-122/35 | | 2/3x-5/9=-31/27 | | 4k+4=36/5 | | 3w-8=-9 | | -7/9-7t=371/9 | | -5/6w+2/3=-8/3 | | 3w-8=-8 | | 4/5n+1/7=13/35 | | 2x+8/9=44/9 | | 2/5k+1=-13/5 | | 2w+9=25 | | 5w+3/4=-5/4 | | 3/7n+4/9=-80/63 | | 2a+7=57/7 | | -5/7+2/7d=1 | | 10-1/2x=59/6 | | 2+2/3b=-16/3 | | 2/7+1/4n=23/56 | | m+1=17/11 | | -5w+1/6=91/6 |