If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
(3/7)*x+(2/5)*x-5 = -407/35 // + -407/35
(3/7)*x+(2/5)*x-(-407/35)-5 = 0
(3/7)*x+(2/5)*x+407/35-5 = 0
29/35*x+232/35 = 0 // - 232/35
29/35*x = -232/35 // : 29/35
x = -232/35/29/35
x = -8
x = -8
| 2x-9+1/4x=-54/7 | | -4/7x+3/5+1/6x=41/210 | | 101/15=-1/6x-3x+8 | | 103/5=x+x+3/5 | | -7/15=x-3x+7/10 | | 10=3x+x-10 | | 4x+1/8+3/7x=751/56 | | 2/7x-3+2x=155/7 | | 2/3x+1/6-x=-11/6 | | 1-4/5x+1/3x=25/18 | | 5/7+x+5/7x=-1 | | -x-5+4/5x=-5 | | x+5/6-3x=-43/6 | | 2/7x+2/3+3/5x=769/735 | | 90=2x+6x+2 | | -6/7x+1/2-2/7x=-17/126 | | -5/8+1/3x-4/5x=-131/120 | | (9b-2)-2(4b+4)=-4 | | -81/10=-2/7x-7x-3 | | 2-1/5x+5x=14/25 | | 5/2=-1/4x+3/7x+5/7 | | -5/9-x+2x=22/9 | | 3x+1+4/5x=1 | | 39/11=-6x+7x+4 | | 5x-(4x+8)=-3 | | -3/8+2/3x-1/3x=-35/8 | | 7x+2/3+4/5x=-1277/15 | | -3/7x-6-5x=-202/21 | | 2/5-4x-x=-48/5 | | 5/6x+7/10+x=83/40 | | 6x+8+3x=17 | | 9x+4x+3+8=7x+3+5x |