If it's not what You are looking for type in the equation solver your own equation and let us solve it.
d-d+2d=18
We move all terms to the left:
d-d+2d-(18)=0
We add all the numbers together, and all the variables
2d-18=0
We move all terms containing d to the left, all other terms to the right
2d=18
d=18/2
d=9
| 1.2(x+12)=5(1.8) | | 2m-4(m+1)=4(m+3) | | -n-4n=5 | | 2x+5=2*130 | | 51-6v+2v=5 | | 2x+5=2x130 | | 3^(6x-3)=2^(4x+6) | | 15=4n+5+6n | | 12b+12=8b+60 | | 3a-4=13 | | 1+3r+2r=-14 | | 7x-12=8x-14 | | 5a+6-5=21 | | 12b+12=8b-60 | | 5x-1=4x-6 | | 2x+5=2.130 | | -2n-3-8=-5 | | 2=t/4− 2 | | d/2+ 15=18 | | 2x-2-2*47-2=x | | 5x+6=5x+6= | | 5x–1=3x–15 | | 2x/6=52 | | 3/5x+6=33 | | 2y+33=4y+11 | | 2x+1/2×2x=101 | | 7x+14–2x=-x+12–x−19 | | 6u+14=9u-13 | | 2y-20=100 | | 1x+20=3x+20 | | $50+$20x=290 | | 2^x-16=48 |