3=r-21

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


Simplifying
3 = r + -21

Reorder the terms:
3 = -21 + r

Solving
3 = -21 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
3 + -1r = -21 + r + -1r

Combine like terms: r + -1r = 0
3 + -1r = -21 + 0
3 + -1r = -21

Add '-3' to each side of the equation.
3 + -3 + -1r = -21 + -3

Combine like terms: 3 + -3 = 0
0 + -1r = -21 + -3
-1r = -21 + -3

Combine like terms: -21 + -3 = -24
-1r = -24

Divide each side by '-1'.
r = 24

Simplifying
r = 24

See similar equations:

| 3x+4+2= | | 2(7x-4)2=(11+10) | | 8-5x=4-1 | | 0.05x+1=105 | | -6-11=10x+17 | | 200x-2=398 | | 2+5lnx=5 | | 4y+2=-.033(8-12y) | | 206=3x+2y | | p-16=-13 | | 4x+76=212+2x | | -5x-3=8x+15 | | n-4 + 16 = 15 | | n-4 + 16 = 15 | | 12x^2+16x+16=0 | | .09-.02x-.02=-.03+.03x | | 8=4+2s | | 5x+9-3x=7+4x-6 | | -3-3x=39 | | 0.25+x=0.25 | | 4x+7=131 | | 9=3+2k | | 14x-15x=-0.993 | | -1n=4 | | n-23=-49 | | 7(y-1)-3=-4(-5y+4)-9y | | x-0.1x=20000 | | 7p-12=-54+p | | 8x-5=7+6x | | 3x-9x+45=4x+35 | | -1=2+2r-5r | | 12x-2=13x-10 |

Equations solver categories