12-3r=9

Simple and best practice solution for 12-3r=9 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 12-3r=9 equation: 


Simplifying
12 + -3r = 9

Solving
12 + -3r = 9

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + -3r = 9 + -12

Combine like terms: 12 + -12 = 0
0 + -3r = 9 + -12
-3r = 9 + -12

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

Divide each side by '-3'.
r = 1

Simplifying
r = 1

See similar equations:

| 70-5x=x | | 5/8*(-1/5) | | 70-(x*5)=x | | 5/8×7/10 | | 9+4a-(3a+6)-(3a+7)= | | 8x^3+12x-18=0 | | 9(y-1)=-81 | | 2(-3+3)=2z+22 | | 23/x=25/18 | | 5y=5/5*5/5*5 | | -18.526=log(x) | | (-9-6)=(-6-9) | | 45-x/5=30 | | (45-x)/5=30 | | 2x-5y=100 | | PNC= | | 8+9(x-2)=10-5(x-4) | | 4x-10+30=180 | | 2y=6/9 | | X+4x-5+55=180 | | X+(4x-5)+55=180 | | 4(n+8)+4(n-2)= | | 4x^3-14x-8=0 | | 5x+-4=-19x | | 5x^3-21x-23=0 | | -5=5x-3x+11 | | 2x-21=-7 | | 46s+90=6s+6s+10(9+4s) | | q=20-8p | | x+2y=n | | 4b-20=-8 | | 3^x^x=(1/9)^x-4 |

Equations solver categories