r-3+8r=-21

Simple and best practice solution for r-3+8r=-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 r-3+8r=-21 equation: 



r-3+8r=-21

We move all terms to the left:

r-3+8r-(-21)=0

We add all the numbers together, and all the variables

9r+18=0

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

9r=-18

r=-18/9

r=-2

See similar equations:

| 10m^2-41m+45=0 | | 10x-24-3x=1/2(14x-24 | | 3+8s-1=9s+30-5s | | 3+1/5x=-21 | | |7x+4|+6=12 | | 3.3x+5.2=-25.8 | | 3.3x+5.2=25.8 | | 1/3b+4/3=-7/3 | | -1/3*b+4/3=-7/3 | | 7=6(c+4)-5 | | 2.1•p=4.7 | | 7=2n=n-14 | | 45=n+3 | | 3x+2-(4x-1-9x)=6-1 | | -(x+1)-0.2=3.8 | | 512^(5x+1)=1/8^(4+x) | | (z/2)+6=50 | | Z=-16i | | x^2+3x=405 | | 8x-15=-3x+9 | | -2k=-3k-3 | | 12b+9=12b+ | | 3y+3=y=y+4 | | 3x+24x+23=0 | | x+8=2x-3=x-1 | | 12y+8-2y+6=0 | | 12a-2a+5=0 | | 5n-3n+6-3=0 | | 140=3z+3+4z-3+3z+3+4z-3 | | 61=5x-2+x+3+4x | | 55=3z-1+z+3+2z+11 | | 212=5y-2+4y+5y-2+4y |

Equations solver categories