3b+9=21

Simple and best practice solution for 3b+9=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 3b+9=21 equation: 


Simplifying
3b + 9 = 21

Reorder the terms:
9 + 3b = 21

Solving
9 + 3b = 21

Solving for variable 'b'.

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

Add '-9' to each side of the equation.
9 + -9 + 3b = 21 + -9

Combine like terms: 9 + -9 = 0
0 + 3b = 21 + -9
3b = 21 + -9

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

Divide each side by '3'.
b = 4

Simplifying
b = 4

See similar equations:

| 4x+3=3-x | | -3(x-7)-7=14 | | 7.3x-.07=5.6 | | sqrt^3(5x+2)=5 | | 54/(2x+1)=6 | | 2+9x=7x | | -5r+18=r | | 3(9x-3)+4x=3 | | 8(x-3)=2(x+7) | | 2x+7(x-5)=2(x-7) | | 6x-5+9x=7.4x-12 | | X=VRU | | 65=-5x+2(-7x-15) | | 6(4-m)=2m | | 5/9(1725-32)=c | | 2x+6(x-5)=2(x-7) | | a=1/2*15*16 | | 5x+14-4x=-6-11 | | 5=-5-5x | | V=XRUforx | | 5/9(1725-32) | | -5x+11=3x-21 | | 7c-5=11c+9 | | 5(4+x)-2(x+2)= | | 2(1.5x+4)-6x=-7 | | 3(2-x)=-3(x-1) | | 7.3x+6=4(x-2)+11 | | 5(4+x)-2(t+2)= | | 4n/3= | | 12-41=3(x-4)-8 | | -0.9m-4.7-2.6m=9.9-3.5m-14.6 | | 80x+4y=y+720 |

Equations solver categories