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)
-((3/7)*a)-2 = -41/21 // + -41/21
-((3/7)*a)-(-41/21)-2 = 0
(-3/7)*a+41/21-2 = 0
-3/7*a-1/21 = 0 // + 1/21
-3/7*a = 1/21 // : -3/7
a = 1/21/(-3/7)
a = -1/9
a = -1/9
| -2-2b-4b=46 | | -2-2/7t=-24/7 | | -2-2/7k=-76/35 | | -2-1/6n=-5n+52/3 | | -2-1/6k=-4 | | -2-1/3t=t+22/3 | | -2-1/2w=-4/5w-19/5 | | -2-1/2w+w=-5/2 | | -2+x=-17/10 | | -2+w=2 | | -2+t=-11/6 | | -2+m=3 | | -2+m+1/6m=12 | | -2+m+1/2m=13 | | a+(5+3a)=29 | | -2+d=-17/6 | | -2+d=-3 | | -2+b+6/7b=116/7 | | -2+6w=-2w+94 | | -2+6t=-38 | | -2+6t+4t=-42 | | -2+5a=-9/2 | | -2+5/7t=-136/63 | | -2+5/7d=36/7 | | -2+5/6x+3/5x=-55/6 | | -2+5/6b=2/3b-2 | | -2+4t+5/6t=-31/30 | | -2+4b+4b=-6 | | -2+4/7m=-88/35 | | -2+3x+3/4x=7/4 | | -2+3t+3t=-3/2 | | -2+3/7d+5d=34/21 |