-3x-9=21

Simple and best practice solution for -3x-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 -3x-9=21 equation: 


Simplifying
-3x + -9 = 21

Reorder the terms:
-9 + -3x = 21

Solving
-9 + -3x = 21

Solving for variable 'x'.

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

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

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

Combine like terms: 21 + 9 = 30
-3x = 30

Divide each side by '-3'.
x = -10

Simplifying
x = -10

See similar equations:

| 3/4-21=48 | | 56*2=16x | | 25-0.5=25 | | 2j+j= | | (6x^5z)^3/4x^4z^2 | | 5x+6=30x+4 | | 3x+2x+5=x+11 | | -50+10x=46+2x | | 6r^2-16r+20=10 | | -16+126=-15 | | 9x^2-64x+4=0 | | m+2=3+m+4 | | 1-1r=-5 | | 2x+34=8x-2 | | -3x+8=18x-5 | | -7x+3(3x+25)=93 | | 6a+10=100 | | x^5/7=-1/6 | | G(2)=3f(2)-2 | | 4a+40-12a+9=146 | | 3(6z+7)+(10z+45)=180 | | 6(4z-1)-4(z+8)=11(z+1) | | r^2-16r+20=10 | | 1/3x5/3 | | 3x+68=59 | | r^2-16+20=10 | | 24-3x=20+x | | 25-3= | | 1-4x=8+4x+9 | | r^2-16r+64=54 | | 3(3w-4)=-30 | | (3y+1)+(2y+2)=132 |

Equations solver categories