-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:

| .6x-4=5+.2x | | 6m-7(1+7m)=351 | | 6w-1.5=1.5w-0.8 | | T=6s+4.18 | | -6(8-3)=7k+29 | | 180-x=2(180-(90-x))-60 | | 2x^2+32+120=0 | | 28-6x+4=30+-3x | | 2x+-5=5x+-11 | | 2x=9x+18 | | y-(6-y)= | | x+4-6x=5x-2 | | 2n+24=6n-40 | | -8(4+4b)-6=2(b-4)+4 | | 18+4x-3=43-3x | | -2(x+2)=1 | | 45=8w-6 | | -2g-9=6a+15 | | f(n+1)=f(n)+8 | | (b^2)=b^8 | | 18x+4x-3=43-3x | | 5(15x)+25=800 | | -5y-13=4y+23 | | f(n+1)=f(n)8 | | 7(6x-1)=42x-7 | | -3z+8z+8y= | | x+12=3x-6 | | 4y-(y-4)=-21 | | 63+18y+y=49 | | 8x+35+11x+23=115 | | 2x-4+3x-10=17 | | 7x+3+x+5=-3 |

Equations solver categories