3x+21=0

Simple and best practice solution for 3x+21=0 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 3x+21=0 equation: 


Simplifying
3x + 21 = 0

Reorder the terms:
21 + 3x = 0

Solving
21 + 3x = 0

Solving for variable 'x'.

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

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

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

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

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

Simplifying
x = -7

See similar equations:

| 5b-2=2(3b-4) | | 141-2x=6x+21 | | y=9+x | | 0.33k-4=9 | | 0.3k-4=9 | | 2d+24-14=84 | | 11x-7=7x+3 | | 11x-9=7x | | 12-(-8x)+2x-(-9)= | | 3(3+4x)=15x | | 5+6x=29 | | 45-7x=3 | | 3(x+3)-4(x-1)=6 | | y=36.76+-3424.731GLO | | 8p+14=2p-22 | | y=86.010*LOG(34-16)-70.041*LOG(71)+36.76 | | m+10m= | | 5n-7=8n-19 | | 5-4=3b-5 | | 25x^2+144=0 | | 0=4+35t-16t^2 | | 3x=2(x-1) | | 5-2x=3-4x+13 | | 21x=20x+16 | | 2a*2a*2a*2a= | | 2a*2a*2a= | | 7x+4y=21 | | 2a*2a= | | -4(-25+5(7+1))=x | | 8.3(x+3)=14 | | 3(x-3)+1=1 | | -12(x+6.2)=60 |

Equations solver categories