21=-3x+9

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


Simplifying
21 = -3x + 9

Reorder the terms:
21 = 9 + -3x

Solving
21 = 9 + -3x

Solving for variable 'x'.

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

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

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

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

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

Combine like terms: 9 + -21 = -12
3x = -12

Divide each side by '3'.
x = -4

Simplifying
x = -4

See similar equations:

| -9+m=36 | | 4000+300x=3600+250x | | 221=x*(x+4) | | 6x-5=1/4(16x+60) | | -60x+55=-87+23x | | 2x^2+2y^2-12x+20y=4 | | 360=114+101+w+(w+9) | | 3(a-5)+3=4(a-3)-a | | -1=1/3x | | 144=-12x+60 | | -3(x+1)+8=32 | | 5(-9x+6)=-3x | | 2x+6=x+10+1 | | y=7x^3-7x | | 2x-8x+1=8 | | 2-5.5=3.4 | | 2x+5=x+x+5 | | 6g-9=6g+5 | | 60=4v-4 | | -12=-4+2c | | 6g=144 | | 8(4)+14y=4 | | X-0.3=5 | | 23643e= | | 100-7x=135 | | 3n-10=8 | | 18+b=24 | | 3h-9=39 | | 3(4x-2)=13x-3 | | 8+7j=22 | | a(5-3)=45-b | | (x-8)12=84 |

Equations solver categories