21=6r+55-7r

Simple and best practice solution for 21=6r+55-7r 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=6r+55-7r equation:


Simplifying
21 = 6r + 55 + -7r

Reorder the terms:
21 = 55 + 6r + -7r

Combine like terms: 6r + -7r = -1r
21 = 55 + -1r

Solving
21 = 55 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
21 + r = 55 + -1r + r

Combine like terms: -1r + r = 0
21 + r = 55 + 0
21 + r = 55

Add '-21' to each side of the equation.
21 + -21 + r = 55 + -21

Combine like terms: 21 + -21 = 0
0 + r = 55 + -21
r = 55 + -21

Combine like terms: 55 + -21 = 34
r = 34

Simplifying
r = 34

See similar equations:

| 3(4x-1)=92 | | -(3y+1)-(-2y-6)=1 | | 6r+10=4r+22 | | 6z+13=7z+7 | | -10=2-3x | | 2x-11=x | | 18+5T=39-7t | | Y=639-6x | | 3(a-3)=2(a-4) | | 7n+6=76 | | x(x+2)=x(x+4)-12 | | 4x^2+x+9=9x+6 | | 4y-7=3y-8 | | (2x^4)+(4x^2)+(2)=0 | | x^2-7x-7=-8x-5 | | 7n-2=12 | | 5.5x+2y=1278 | | 4n-24=48 | | x^2+11x+26=8 | | 10x-6=3x+22 | | y^3+y^2-4y=0 | | x^2+2x=16 | | 12X+7=17-3X | | f(0)=2x-5 | | -42=7m | | 1+3W=11W-3 | | 2x+1=12x-101 | | 4x^2-29x+41=-2x+6 | | 0.02x^2+0.5x-4=0 | | log(4x+13)*log(9x^2)=0 | | 3C+7=4+5C | | (10x+1)(100x^2-10+1)= |

Equations solver categories