If it's not what You are looking for type in the equation solver your own equation and let us solve it.
8.5d+3=12.1
We move all terms to the left:
8.5d+3-(12.1)=0
We add all the numbers together, and all the variables
8.5d-9.1=0
We move all terms containing d to the left, all other terms to the right
8.5d=9.1
d=9.1/8.5
d=1+0.6/8.5
| 5.8x=7+x | | n-3.7=1.2n | | 2.3y=-4 | | 6=-16+c | | X+1.3x=276 | | 8x^2+16x+40=0 | | x-(x*0.25)=20000 | | 2x^2=21^2 | | 3^x*5^(x-1)=45 | | x³=-64/125 | | -3x^2+12x-231=0. | | 6-5z=-5 | | 3m+4=-23(m=-9) | | x/4=15/22 | | 0.375÷n=0.1 | | 3n+1=1057 | | 3n+1=82 | | 1-5p-2p=0 | | Y=2x^2+24x-25 | | 1-5p-2p2=0 | | (4/9)^x*8^1-x=486 | | 2y-30=-8y | | -3x=-7x-4 | | ½x+30=70 | | 2x=12x=12/2x=6 | | 5(x+3)-2(x-4=3x+23 | | x^2×2=14 | | 19/23=t | | (7x²-4)²=-3 | | 1*2*3*4*5*6*7=x | | V’(x)=12x2–202.8x+623.7 | | 3-p=2+p |