3a-6=21

Simple and best practice solution for 3a-6=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 3a-6=21 equation: 


Simplifying
3a + -6 = 21

Reorder the terms:
-6 + 3a = 21

Solving
-6 + 3a = 21

Solving for variable 'a'.

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

Add '6' to each side of the equation.
-6 + 6 + 3a = 21 + 6

Combine like terms: -6 + 6 = 0
0 + 3a = 21 + 6
3a = 21 + 6

Combine like terms: 21 + 6 = 27
3a = 27

Divide each side by '3'.
a = 9

Simplifying
a = 9

See similar equations:

| -1=5x-3x-9 | | 48-m=4m+-7 | | (y-5)squared+9=0 | | -72=4u+2u-18 | | 5x+6+4x=51 | | 7x=200 | | (y-5)2+9=0 | | Bx+5=25 | | 7j-6=-3j-6 | | 12=3(a+2) | | 9n-11=34 | | (-1)-2c=4 | | 3z+8+4z=7-4z | | -2h-19=-h | | 2-5x+2x=-16 | | 3m-m=50 | | -11+2f+8=12-f | | 4x+9+4x=41 | | 32x^2+28x+1=0 | | -15t-11=-13t+17 | | 2.3(x-1.3)=16.56 | | 6y^2-7y=3 | | -3b-3=-6b-3 | | -18+w=2 | | -7+5y=8+8y+6 | | 4x+7=x+4 | | -5-8n=8-7n-7 | | Log(6x+8)=3 | | 13x+24-11x=-24-6x | | -x+1-x=-23 | | 100x-20x+6=66 | | -7x-6x+3=29 |

Equations solver categories