x+(x-3)=21

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


Simplifying
x + (x + -3) = 21

Reorder the terms:
x + (-3 + x) = 21

Remove parenthesis around (-3 + x)
x + -3 + x = 21

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

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

Solving
-3 + 2x = 21

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 2x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 2x = 21 + 3
2x = 21 + 3

Combine like terms: 21 + 3 = 24
2x = 24

Divide each side by '2'.
x = 12

Simplifying
x = 12

See similar equations:

| BX=-7 | | 22x-5(3-x)=4(1-x)-7(2-x) | | 3x+2(0)=8 | | 3x-2(0)=8 | | 9(11-k)=(3k-9) | | 3(0)-2y=8 | | b=24b | | -.25a+1.75a=-21 | | x+9/18=12/72 | | 2*3x=17 | | 6a+6=30 | | 2/3(4x-1)=-22 | | -2.7=-3+t+24 | | x/4+2=-3 | | 4(x-5)-2x=3x+10 | | 20x=240 | | 11x+37=7 | | 3x+5=X | | 4(x^2-2x+1)-3=0 | | d=3ac | | 7t-15=5+11 | | 7.12=2*3.14R | | n-0.33=0.4 | | 6x-10=5(x-2) | | 5+4m^4=4-m^2 | | 3x^2+18+15=0 | | 7t=5t+26 | | -7+32-12+7= | | 5c+5=4c+21 | | 4(x-6)=2(5+2x) | | 3-2y=8 | | 6x+7=35-x |

Equations solver categories