-9-2r=r+12

Simple and best practice solution for -9-2r=r+12 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 -9-2r=r+12 equation:


Simplifying
-9 + -2r = r + 12

Reorder the terms:
-9 + -2r = 12 + r

Solving
-9 + -2r = 12 + 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.
-9 + -2r + -1r = 12 + r + -1r

Combine like terms: -2r + -1r = -3r
-9 + -3r = 12 + r + -1r

Combine like terms: r + -1r = 0
-9 + -3r = 12 + 0
-9 + -3r = 12

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

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

Combine like terms: 12 + 9 = 21
-3r = 21

Divide each side by '-3'.
r = -7

Simplifying
r = -7

See similar equations:

| -8(4-b)=7b-40 | | 18x^2/4x=18 | | 4x+2(x-7)=16 | | -6v+4(v+6)=8 | | 1.75x+3y=50 | | 4+x/5=-6 | | (-4x+10)(-4x-5)= | | -8x^2-20x-50= | | 6x=34 | | 4(n-2)=10n+4 | | 5(7+6v)=13+8v | | 3*x^2+8*x-9=0 | | 6m=2/3 | | 5y^4-7y^3+1=0 | | 2x^2+10xy-7x-35y=0 | | 2y^3+7y^2-4y-14=0 | | 3(2n+3)=9n-3(-3) | | 0.40x+0.30(60)=0.20(148) | | 3x-5=-5x+14 | | 18=0.5h(2+7) | | 25-81v^2=0 | | 6x-7=-34+3x | | 26=(5)(3)+b | | m^5= | | 5x-26=-30+4x | | 26=(4)(3)+b | | 0.14(y-4)+0.06=0.10y-0.03(30) | | (y^9)5= | | 6(3+6x)-1=233 | | 42x^6y^6/6x^5y^5 | | 15c+495=720 | | 7(6n-6)=36+3n |

Equations solver categories