If it's not what You are looking for type in the equation solver your own equation and let us solve it.
b in (-oo:+oo)
3/10-2*b = (-2/5)*b+41/30 // - (-2/5)*b+41/30
3/10-2*b-((-2/5)*b)-(41/30) = 0
(2/5)*b-2*b+3/10-41/30 = 0
-8/5*b-16/15 = 0 // + 16/15
-8/5*b = 16/15 // : -8/5
b = 16/15/(-8/5)
b = -2/3
b = -2/3
| -2b+1/7=71/7 | | -2b+1/4=-47/4 | | -2b+1/3=4/3 | | -2b+1=-5/7 | | -2b+1+6/7b=31/7 | | 8(x)-2(0)=16 | | 8(0)-2(y)=16 | | -2a-7=-a-73/10 | | -2a-6/7=-152/63 | | -2a-3=-5 | | -2a-3=-4 | | -2a-2/3=22/3 | | -2a-2=-14/11 | | -2a-10=-34/3 | | -2a-1/5=-61/5 | | 0=-1/4(x)+2 | | -2a-1+4a=13 | | -2a+9/10=83/70 | | -2a+6=54/7 | | -2a+6=-6 | | -2a+5/7=89/7 | | -2a+4/9=6a-284/9 | | y=-1/4(0)+2 | | -2a+3/4-4/5a=-53/4 | | -2a+3+3a=3 | | -2a+2/5=-8/5 | | -2a+2/5=-4/15 | | -2a+2=-12 | | -2a+1/6=-19/30 | | 2=-3x+5 | | -1=-3x+5 | | -27=-5n+n+1 |