If it's not what You are looking for type in the equation solver your own equation and let us solve it.
21=9d+3
We move all terms to the left:
21-(9d+3)=0
We get rid of parentheses
-9d-3+21=0
We add all the numbers together, and all the variables
-9d+18=0
We move all terms containing d to the left, all other terms to the right
-9d=-18
d=-18/-9
d=+2
| -10=5x/5-5 | | (2x+8)=(9X-16)=(3x+6) | | 5(2n-4)-n=-83 | | 2x5=3x-10 | | (2x+8)=(9X-16) | | -25=2w-6w | | k+82=902 | | 7x-9=10x+39 | | 14=17–3d | | n+235=790 | | 25.75x+22.00=19.50x+47.00 | | h+314=401 | | 10+m=-2 | | 4/7=8/x+1 | | t+531=925 | | −5(−2x−4)+5x−4=-29 | | w+39=67 | | d-41=11 | | x-4(x+3)=8-(8x+10) | | 2x=53x-10 | | 1/8x+8=10 | | 9=4w | | 4/5w+10=42 | | 2=0.1d | | h/8=9 | | u-61=1 | | 6(2x+12)=96 | | 91.90=14.7v+47.8 | | 5(x+4)=6x-24 | | c-149=586 | | 6s=30 | | -2(11-7x)+54=4 |