x+x+x=21

Simple and best practice solution for x+x+x=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 x+x+x=21 equation: 


Simplifying
x + x + x = 21

Combine like terms: x + x = 2x
2x + x = 21

Combine like terms: 2x + x = 3x
3x = 21

Solving
3x = 21

Solving for variable 'x'.

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

Divide each side by '3'.
x = 7

Simplifying
x = 7

See similar equations:

| -175-x=45-12x | | 5ln(5x+6)=10 | | g/3=h | | 274=-22 | | .6x-9=33 | | 5x+14+8z+12=180 | | 42+9x=3x+96 | | 21=CD+e | | 4x^2+x=6-8x^2 | | -500+4732= | | x-5x-16=0 | | 7(x+4)=8x+31 | | 8r+38+13s-8=360 | | 7m+2n+5p+4m= | | 7/6-(-2/9) | | -x+2=x-5-3 | | 9p+2-2(3p+8)=5p | | ((3-4x)/6)-((2x-3)/8)2-x | | 8c^2-2c+1=4c | | -8n-2=n+14 | | -4x-97=12x+55 | | -6-8(1+7x)=2(-7+8x)+4x | | 3=10+9x | | 1m+2-6m=2+3m | | -50+9x=2x+41 | | 2xy-3xz+17=9y | | 9q+2-2(3p+8)=5p | | 6c-18+7b-20=180 | | x^2(x^2-9)=0 | | X+1=1-4x-1x | | 1x+9=126 | | 80n+16=n+5 |

Equations solver categories