21=-7a-4+4

Simple and best practice solution for 21=-7a-4+4 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=-7a-4+4 equation:


Simplifying
21 = -7a + -4 + 4

Reorder the terms:
21 = -4 + 4 + -7a

Combine like terms: -4 + 4 = 0
21 = 0 + -7a
21 = -7a

Solving
21 = -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
21 + 7a = -7a + 7a

Combine like terms: -7a + 7a = 0
21 + 7a = 0

Add '-21' to each side of the equation.
21 + -21 + 7a = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 7a = 0 + -21
7a = 0 + -21

Combine like terms: 0 + -21 = -21
7a = -21

Divide each side by '7'.
a = -3

Simplifying
a = -3

See similar equations:

| 3s^3-192= | | (2x-1)=3x | | t=.25(i-33120)+4867.50 | | -4=2r-r | | 8+6x=17-8x | | 3(x+1)=2(x+12) | | X+6-3x=-2 | | -5+8r+r=13 | | 3x-4-4=-8 | | -1-4r-5=14 | | -12=-4b-b+7b | | 1/8x=24 | | -5(-7k+2)=-10-8k | | 8-5v=8(7v+1) | | f(x)=x^6-124x^3-125 | | (3x-5)=1-x | | 1/3(w=1)2w=12 | | (5v+3)(6+v)=0 | | .2(10-15x)+4=5 | | -3(r+6)=38+5r | | -19=-2(25)-1-5 | | -19=-225p-1-5 | | y+4(y-3)=-22 | | .5-4=1.25 | | y/2-2=10 | | 4x-5/8=3/8x | | 1x+1-2x=0 | | 6n+2(6+6n)=84 | | -16=-2-1-65x | | 1/4y-3=1 | | 11n^2=-2-12n | | 21-3-2x-2=33 |

Equations solver categories