3a+9-6=21

Simple and best practice solution for 3a+9-6=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+9-6=21 equation: 


Simplifying
3a + 9 + -6 = 21

Reorder the terms:
9 + -6 + 3a = 21

Combine like terms: 9 + -6 = 3
3 + 3a = 21

Solving
3 + 3a = 21

Solving for variable 'a'.

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

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

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

Combine like terms: 21 + -3 = 18
3a = 18

Divide each side by '3'.
a = 6

Simplifying
a = 6

See similar equations:

| 9.95m=m | | -3(x+5)=-3x-15 | | -18+2(j-12)=-12j | | 25200*(1/10) | | 4.95m+49.95=m | | -0.75x-2=0.25x | | y-6=-5/4(x+1) | | 6y=-3x(2)-4 | | (x+2)*3=(x-10)*7 | | 6(7g-16)=4(6g+12) | | 52=p | | -8(-6x+6)=-4x+4 | | -5v-38=-3(5v-4) | | 25200(1/10) | | 5x+83=29 | | -48-6x=(-3x)+12 | | 8.3+6x=8.6 | | 6=-3(2)-4 | | 31=w/3+31 | | z2=25/49 | | -9(-4)+7=25+2(5--7) | | 3.6x=1.6x+24 | | 16.65-8.5c+17.66=11.87-9.7c | | u=2(8n+30)+5(n+1) | | P=2(100)+2(200) | | 3x^2+6x+k=0 | | 50=-2+13x | | 25200*(1/5) | | 13=5+3b-1 | | y2=16/64 | | -5.3b-15.16=-5.1b-11.72 | | 25200*(1/4) |

Equations solver categories