3a-12=9

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


Simplifying
3a + -12 = 9

Reorder the terms:
-12 + 3a = 9

Solving
-12 + 3a = 9

Solving for variable 'a'.

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

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

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

Combine like terms: 9 + 12 = 21
3a = 21

Divide each side by '3'.
a = 7

Simplifying
a = 7

See similar equations:

| 7-4a-2=197-a | | 6(y+6)=84 | | 5-4a=90+2a-a | | 5a-9=5-2a | | -2a+4=-6-4a | | 3x-0.6=4x | | 26a-2=22a-22 | | 6a+8+3a=-24+a | | 13a-4-a=8 | | 5a+40=46+2a | | P^2+19p=0 | | 44141=11212-7 | | 38-2x=4x+2 | | -3x^2+26x=0 | | 180-20/5= | | 4w+7=27 | | 32-(x+9)=6x-5 | | 24x^2-36=12x | | 10x+1y+7z=1 | | 7x+2(x-5)=5(x+2)-3 | | 0=x^5-25x^3+144x | | 5x+2y+z=15 | | 40.50+4x+3y=37.50+5x+2y | | -b-6b=21 | | 40.50+4x-3y=37.50+5x+2y | | 2x-8=4x-10 | | 4r-8-1=7 | | g(x)=x^2+12x+37 | | 2(-1)+8=6 | | -4n+2n=14 | | 3(3+2)+5=2(2u-2) | | x+0.21x=10000 |

Equations solver categories