21=3a

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


Simplifying
21 = 3a

Solving
21 = 3a

Solving for variable 'a'.

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

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

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

Add '-21' to each side of the equation.
21 + -21 + -3a = 0 + -21

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

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

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

Simplifying
a = 7

See similar equations:

| 2x+9=x+87 | | 2x+9=x+87 | | 5m-(6m+9)=21 | | 11x^2+1=2x^2 | | 10x-14=6x-8 | | 6h^2+17h+12=0 | | Y^2-16y=0 | | 0.25x=14 | | 4(x-8)+10=10 | | 10x-15=6x-12 | | 5(x-2)=5x+3 | | 2(x+5)-16= | | 2x-7=7x^2 | | 0.02x=1.24 | | .7=-56z | | w(3w-2)=28 | | 4b(2b+3)=36 | | 3(4x+2)-25=7x-4 | | w(2-3W)=28 | | 3x+21=11x-59 | | 12x-34=6x+2 | | -7x+29y=-3 | | 2x+20=80-4x | | 6=7f+4f | | 3x+64=8x+14 | | 82.8=4.6x | | Y-3=-12 | | -2(-7x+1)=18 | | 7x+16=5(8-x) | | 17+9x=31-5x | | f=wsz | | w(3w-2)=40 |

Equations solver categories