(8-m)+4=21

Simple and best practice solution for (8-m)+4=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 (8-m)+4=21 equation:


Simplifying
(8 + -1m) + 4 = 21

Remove parenthesis around (8 + -1m)
8 + -1m + 4 = 21

Reorder the terms:
8 + 4 + -1m = 21

Combine like terms: 8 + 4 = 12
12 + -1m = 21

Solving
12 + -1m = 21

Solving for variable 'm'.

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

Add '-12' to each side of the equation.
12 + -12 + -1m = 21 + -12

Combine like terms: 12 + -12 = 0
0 + -1m = 21 + -12
-1m = 21 + -12

Combine like terms: 21 + -12 = 9
-1m = 9

Divide each side by '-1'.
m = -9

Simplifying
m = -9

See similar equations:

| 3/4(d-16)=-2(d-3)+4 | | (ax-b)(ax-b)+(bx-a)(bx-a)=x | | 147-3x=24x+21 | | x^2-8x=.95 | | x+5=-3x-3 | | X^2+3x+6=4 | | -10-6x=14-10 | | x^2=.95x-2x | | xsquared=.95x-2x | | 3x-30=5x-48 | | -12x=3x+60 | | 3x-1=49 | | 5x=12.65 | | x^2-x-46=0 | | -7X=-25 | | -3(x-2)-4=2 | | 2lgx+1=5 | | 3x=15-(-6) | | x(2x-12)=14 | | -9-2=5x+7-4x | | 3x+4-2x=10 | | 36.25x^2=1.8x+64 | | 40x=3 | | 3x+5x-3=0 | | 12x-7y=-9 | | -x^2+x^4=12 | | 21x+3y=-15 | | Y=3x^2-2x+5 | | -2(w+5)=-8w+26 | | 4y-16=-6(y+6) | | -6(x+3)=6x+42 | | 6w+7(w+6)=-23 |

Equations solver categories