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)
6*d+9 = 15 // - 15
6*d-15+9 = 0
6*d-6 = 0 // + 6
6*d = 6 // : 6
d = 6/6
d = 1
d = 1
| -8-5m=-18 | | 5m+3=-57 | | -10+3k=-22 | | 4t+2=-26 | | 3+4t=-1 | | 7k+8=57 | | -7b+1=-69 | | 8x^2+21x+22=0 | | 6w+10=-20 | | 6m+2=38 | | 4k-10=38 | | 9+3x=42 | | -6d+2=-34 | | -7-3t=-43 | | -7b+5=-72 | | 9+4b=33 | | -3n-3=6 | | -4m+6=-14 | | 9-3w=36 | | 1-4m=-7 | | -2d-8=0 | | 2+3n=-31 | | -7t+9=65 | | -7t+1=-20 | | -4n+3=-41 | | 5b+7=12 | | -1+4k=3 | | 7+7t=-14 | | 7-4k=-21 | | 6a+5=-19 | | 7a+1=22 | | y+12*y^2=0 |