21=3n

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


Simplifying
21 = 3n

Solving
21 = 3n

Solving for variable 'n'.

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

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

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

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

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

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

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

Simplifying
n = 7

See similar equations:

| 15x^2-29x-14=0 | | -3(2r-8)=-36 | | 3x*4=49+5x | | 1200-45h=1800-60h | | 2x^2+14x+45=0 | | -2(5y-1)+8y=2+4(2y-2) | | 2x-5=-x+7 | | 5x^2+2x-7= | | 3x*4=49-5x | | 5+3(x+7)=29 | | 6(x+1)=-3(3x-4)+3x | | z^2+5z-50=0 | | 7x^2+6x-1= | | 5+(4x-7)= | | 3x+2+4x+6= | | 5x+2y=4-5x | | m+22=19 | | -3p+8=5-(9p+2) | | 15x+26=14-5x | | -5+2x-4x=6-2x | | x+x+16+4x-30=652 | | 2x+3-3=-10 | | -3(-8+7)-3x=3(x-3)-9 | | 4+6=6+2 | | x^2-5x=o | | .75(8x-24)=42 | | -9m*3n+4m*3n+5mn= | | 3(g-7)=.5(20+4g) | | 4h+6=6h+2 | | 2xy-3xy= | | 5-x=x-5 | | 6(y-2)+1=2(3y-5) |

Equations solver categories