If it's not what You are looking for type in the equation solver your own equation and let us solve it.
d+4d=20
We move all terms to the left:
d+4d-(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
| 3x4=16 | | -1.6x=4.8 | | -1/100x+12=0 | | 11n-7n+4n-6n=8 | | 3y-7y+30=10-2y | | (28/4)+x=39 | | 3000x+30=0 | | 7-2m=3+2m | | 4-(1/t)-(3/(t^2))=0 | | |3x-6|=2x+5 | | x+26=81 | | 2(2n+2)=10 | | 5(1-2y)=-65 | | 12/x=x-4 | | a+17a-7a+-10a+19a=20 | | 14-x(-4)=-60 | | 13n+51=168 | | 3x+3+3x+3+2x+2x=116 | | 3y+7-2(-3y-1)=3(y-2) | | -200=2.5t | | g/3+11=23 | | (r-3)(r+15)=-36 | | 4(u-5)-7=-5(-4u+6)-4u | | 3x−20=-2x | | b/8=25 | | 13=-6x+31 | | -23-5z=27 | | 4(u+6)=-2(9u-8)+8u | | 5=f/15 | | -25=k/5 | | -4x-6-2x=-8x-14 | | -10x+7=-123 |