81=2(9+6r)-3r

Simple and best practice solution for 81=2(9+6r)-3r 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 81=2(9+6r)-3r equation:


Simplifying
81 = 2(9 + 6r) + -3r
81 = (9 * 2 + 6r * 2) + -3r
81 = (18 + 12r) + -3r

Combine like terms: 12r + -3r = 9r
81 = 18 + 9r

Solving
81 = 18 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
81 + -9r = 18 + 9r + -9r

Combine like terms: 9r + -9r = 0
81 + -9r = 18 + 0
81 + -9r = 18

Add '-81' to each side of the equation.
81 + -81 + -9r = 18 + -81

Combine like terms: 81 + -81 = 0
0 + -9r = 18 + -81
-9r = 18 + -81

Combine like terms: 18 + -81 = -63
-9r = -63

Divide each side by '-9'.
r = 7

Simplifying
r = 7

See similar equations:

| .33(6x+9)=x-5 | | 2(x)+y=8 | | .6666666x-11=x+4 | | 7x+16+5x+56=180 | | 15a-15=0 | | 2-(-a-8)-15=15 | | 2y=1.5x-1 | | 2x^2-8x+5= | | (96+2x).5=80-3x | | (sqrt)x+1=2 | | -n^2-16n+63=0 | | x+15=-10+6x | | x+15=-10x-6 | | (7y+8)(8y+15)=0 | | 7+6t-t^2=0 | | 2t^3+32t^2+128t=0 | | 6x-3y-3=0 | | 3=6-n-4 | | 5(2)=1.5x+2 | | 2.5-h=.5h | | v+5v=-6 | | 3x-11y-5x-y= | | -2x+5-7x+3= | | -2x+5x-7x+3x= | | -2+5-7+3= | | 12z+5c-30-2zc=0 | | 5a-11w-7a+6w= | | 16x^2=10x | | 3+u(4)=16 | | 3x-5y+8-3x+2y+7= | | -5n+3n=-16 | | 3y-2x-7y+5x= |

Equations solver categories