If it's not what You are looking for type in the equation solver your own equation and let us solve it.
12d+4+8d=9d+15
We move all terms to the left:
12d+4+8d-(9d+15)=0
We add all the numbers together, and all the variables
20d-(9d+15)+4=0
We get rid of parentheses
20d-9d-15+4=0
We add all the numbers together, and all the variables
11d-11=0
We move all terms containing d to the left, all other terms to the right
11d=11
d=11/11
d=1
| x2+16x+63=x+7 | | 4x+2=13x+3=90 | | A=1000(1+0.045/1)10x1 | | A=1000(1+0.045/1)^10x1 | | e+3/8=1 | | 6x+36+6x+26+4x+10+3x-10+5x+10=540 | | 220=113-x | | 8x=76.64 | | 5x+10+7x+25+7x-5+10x+6x-15=360 | | (4.5)x=36 | | A=(3x+35) | | 7/10h=7/2 | | 0.08(y-9)+0.12y=0.10y-1 | | 1.5k=1.2 | | x^2-1.4x-0.3=0 | | 6w^2-138w=0 | | 0.4=(x-12)/x | | 7j^2+29j+4=0 | | 45f^2-41f=0 | | 86-v=15 | | 2x/3+2x/2=7 | | 8e+2e=50 | | 3y+17=8y-58 | | 20+80+80=x | | -4y+9-8=25 | | 3k-7-2=9 | | -3m-7-2m=-22 | | 3(3x+7)+6x=66 | | 3x+9=5x-2x+9 | | -2(3m+5)+6m=15 | | d^2+54=7 | | x=45+100 |