21=1-r

Simple and best practice solution for 21=1-r 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 21=1-r equation: 



21=1-r

We move all terms to the left:

21-(1-r)=0

We add all the numbers together, and all the variables

-(-1r+1)+21=0

We get rid of parentheses

1r-1+21=0

We add all the numbers together, and all the variables

r+20=0

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

r=-20

See similar equations:

| 24+6x=13x | | 8w=80;10 | | 4w=80;15 | | x/(-2)(-3.4)=6.x | | 4(3x-2)-3(2x-4)=0 | | 4x+8=-2-10x | | 2p=64p= | | 0.25x-1=7 | | 9+9=x45 | | (14x3)+(50÷10)–3= | | (3x+10)(4x-15)=180 | | 8-x=53 | | -6m/3=-1 | | 23/5d-3/8d=47/10 | | 2x-1.75x=0.25 | | 1-z/3=-1 | | (3a+12)+(a+40)=180 | | 3y+5y+10y-4y=0 | | Y=19=13=52q | | 3|x=5|x-2 | | -5-z/3=-7 | | a=1/23^8 | | (x)/(x+2)-3=(1)/(x+2) | | 2b-17=31 | | X=140=26=x5 | | 3+3q=-9 | | 6-4v=-10 | | 19-3x*11-2x*3-5x=0 | | 19-3x*11-2x*3-5x=1 | | 5-f=4 | | (2-5i)(3+i)=0 | | 3y/2y-5-y/y+3-6+12y/2y^2+y-15=0 |

Equations solver categories