If it's not what You are looking for type in the equation solver your own equation and let us solve it.
20d-15d=20
We move all terms to the left:
20d-15d-(20)=0
We add all the numbers together, and all the variables
5d-20=0
We move all terms containing d to the left, all other terms to the right
5d=20
d=20/5
d=4
| 4x+-4=4+2x | | 60=-12r= | | 3x+3=4x+-4 | | x^2+8x−75=10 | | |9+v|=-3 | | 6=1-b= | | 10^7x=76 | | 3y+11=-16= | | 2x+50=x+62 | | y-3-2(y-2)+2(3y+1)=0 | | x+x-10+4(x-10)=118 | | -2-x=-x-x-4+2 | | {7n=7} | | x+26=3x-4 | | 7r^2+9r+9=4 | | 40*x=0.5 | | 7f÷4-20=-4 | | 7y/9=-35 | | 35=-5/7u | | 2/5u=-10 | | 6.28x^2=6.28 | | -2/5u=-10 | | -8v=16/5 | | -8v=-16/5 | | 6u/5=-12 | | 3x+4/5x+4=48 | | x+90635=1214.35 | | 3x+4*5x+4=48 | | 3x+4*5x+4=47 | | 135=4x-10 | | 1/x-2=4/x-3 | | 21s/28=3/4 |