If it's not what You are looking for type in the equation solver your own equation and let us solve it.
d in (-oo:+oo)
-3*d = 18 // - 18
-3*d-18 = 0
-3*d-18 = 0 // + 18
-3*d = 18 // : -3
d = 18/(-3)
d = -6
d = -6
| -3d-7/9+1/2d=11/18 | | -3d-5+d=-20/3 | | -3d-2/5=d+118/5 | | 2x(x+3)-5=x+5 | | -3d-10=-13 | | -3d+8/9=-71/72 | | -3d+8/9+7d=-64/9 | | -3d+7=9/2 | | -3d+7=65/11 | | -3d+7=5d+43/5 | | -3d+7=47/8 | | -3d+6/7=-120/7 | | -3d+6=9/2 | | -3d+5/8=-67/8 | | -3d+5-7d=9 | | -3d+5+5d=4 | | -30=2m | | -3d+3=-4d+12/5 | | 5d+12=3 | | -3d+2/3+2/3d=3 | | -3d+2=-25 | | -3d+1/9=-215/9+3d | | -3d+1/4+2/3d=-221/12 | | -3d+1=-1/2 | | -3d+1=-26 | | 13x+1-10x=5xy | | 9-7j=22 | | -3b=30/11 | | -3b-7-3b=53 | | -3b-3=-2b-7 | | -3b-3-b=-5 | | -3b-2/9=160/9 |