2d+d=21

Simple and best practice solution for 2d+d=21 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 2d+d=21 equation: 



2d+d=21

We move all terms to the left:

2d+d-(21)=0

We add all the numbers together, and all the variables

3d-21=0

We move all terms containing d to the left, all other terms to the right

3d=21

d=21/3

d=7

See similar equations:

| 90+30x+60=180 | | 4x+5(3x+5)=6 | | 2x-3=7x=18 | | 2p+p=15 | | -25-(-73)=x | | -25-(-75)=x | | 5(w+9)=3w+49 | | 0,0019x+0,0123=0,0123 | | x2-31x+228=0 | | 0,0138=0,0029x+0,0138 | | w/11=14 | | h/25=4 | | 3(-x+8)=24 | | 4x-6x+10=2x+15 | | -3x+21=33 | | 3x+18=3(2x+4) | | 2x-32=-4x+10 | | 16x+14=7x+95 | | 11x+6=226 | | 5n+10=8n+ | | (3x-2)+(5x+6)=180 | | .6x=15-x | | 3u+8=1 | | X+.04x=90 | | 3x+2–7x=18 | | 3(x-1)=(x-2)·7-3 | | 2x/7x=77 | | x+2x+(2x*3)=405 | | 5x+3=2x+7.5 | | 32/x+2x=0 | | t^2-5t-1=0 | | (11+2x)=180 |

Equations solver categories