-5r-(-1)=21

Simple and best practice solution for -5r-(-1)=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 -5r-(-1)=21 equation: 


Simplifying
-5r + -1(-1) = 21

Multiply -1 * -1
-5r + 1 = 21

Reorder the terms:
1 + -5r = 21

Solving
1 + -5r = 21

Solving for variable 'r'.

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

Add '-1' to each side of the equation.
1 + -1 + -5r = 21 + -1

Combine like terms: 1 + -1 = 0
0 + -5r = 21 + -1
-5r = 21 + -1

Combine like terms: 21 + -1 = 20
-5r = 20

Divide each side by '-5'.
r = -4

Simplifying
r = -4

See similar equations:

| -4Z+7z+3-2z= | | z+3=13 | | 8n+7n=16+7n | | -44=-4x-4 | | 8a−3=17/3 | | 0.1x-2=0.2x+1 | | 4(6x^2-3)-[2(5x^2-1)+1]= | | 4x^2+74x-288=0 | | 11x=300 | | (1-5v)+(-6-6v)= | | -35=(5/7)x | | 2x-y=5x-8 | | d=273+1.75t | | 0.66666667x+0.16666667=-2x+7 | | 14-6(3m+7)=-2m+16 | | 5x+7+x+-9x= | | (1-5v)= | | 6x+150=1x+195 | | 1/2×2x | | 8+3(-8)= | | -2y-y-7=2 | | 9x+1=24-112x+20 | | s/10=-7 | | 0.67x+0.167=-2x+7 | | -7m+5m= | | y=11.2x | | 5x+7+x+9x= | | (2x+10)+(x-50)=180 | | cos(40)=x/12 | | 20u-8=22u-6 | | 168-u=282 | | -64=h+30 |

Equations solver categories