2r-5r=21

Simple and best practice solution for 2r-5r=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 2r-5r=21 equation: 


Simplifying
2r + -5r = 21

Combine like terms: 2r + -5r = -3r
-3r = 21

Solving
-3r = 21

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Divide each side by '-3'.
r = -7

Simplifying
r = -7

See similar equations:

| 3k^2-15k+14=0 | | 3x^2-14x-33=0 | | 5=5-3x | | 20x-2=50x+10 | | (2x-6)+(x+3)(2x-6)+(x+3)=26 | | 2x^2+2x-58=0 | | 2x-3(2x-11)=17 | | x+10=5x-22 | | 2x^4-7x^3-2x^2=0 | | 290=-10-3x | | x+2x-1=23 | | -2n+9n-8= | | 3z^2-7z=3 | | (2x-6)+(x+3)=26 | | -4(6-x)+4=6-6(x+2) | | -10=.50x+x | | 30x+25x=275 | | a+a+6=36 | | 12x+17=9x-5 | | -46+9=5 | | 2x+3-4x=9 | | 5-4(x+5)=6x-15 | | -3G-9=15-9 | | k+5-20=10b+5 | | 9x=999-555 | | 6y-11-3y+7=0 | | 111111*111111+p=12345654321 | | 2(x-21)=38-4(x-4) | | 9.1-4(m-3.2)= | | 2-3+x= | | 2(x+3)=6x+2x | | .75(2+4x)-2.33=5+.5x |

Equations solver categories