If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3-2D-1=13
We move all terms to the left:
3-2D-1-(13)=0
We add all the numbers together, and all the variables
-2D-11=0
We move all terms containing D to the left, all other terms to the right
-2D=11
D=11/-2
D=-5+1/2
| -3x=420 | | 126=14g | | 6.4x=4.8 | | x+11=3x-12 | | m+m-10m=0 | | 4K+3k+4K-4K=14 | | 10z-16z+4z+2z+1=11 | | 1+2 | | 1+2 | | 4x^2+76x-264=0 | | 11c+3c-4c=20 | | 2t+4t-2t=16 | | 5^2x-4=10 | | x(x+6)=80 | | 16d+2d-10d-7d+2=15 | | 3(m-7.50)=40 | | 6n+2n-7n=3 | | 2w-2w+4w-2w=20 | | x/3-14=-10 | | 1.73x=35-x | | 11q-4q=7 | | 3(4x2)=12x-2 | | 3w-w-w=10 | | 7(-1+4b)+1=190 | | -2x=120 | | 3p+2p-4p+3p=16 | | 3a+4a+a+3a=8 | | -5(x-6)+4x=2(5x-2)+1 | | -15-5x=5(1+3x) | | 2h+2h-4h+2h+2=18 | | 16r-r+2r-14r=15 | | 4x+26+2x=10 |