129=-3(-7a-8)

Simple and best practice solution for 129=-3(-7a-8) 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 129=-3(-7a-8) equation:


Simplifying
129 = -3(-7a + -8)

Reorder the terms:
129 = -3(-8 + -7a)
129 = (-8 * -3 + -7a * -3)
129 = (24 + 21a)

Solving
129 = 24 + 21a

Solving for variable 'a'.

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

Add '-21a' to each side of the equation.
129 + -21a = 24 + 21a + -21a

Combine like terms: 21a + -21a = 0
129 + -21a = 24 + 0
129 + -21a = 24

Add '-129' to each side of the equation.
129 + -129 + -21a = 24 + -129

Combine like terms: 129 + -129 = 0
0 + -21a = 24 + -129
-21a = 24 + -129

Combine like terms: 24 + -129 = -105
-21a = -105

Divide each side by '-21'.
a = 5

Simplifying
a = 5

See similar equations:

| -6(1-6n)=138 | | 0.75x+0.05(2-x)=0.10(127) | | 18,069,333.333=1/3(440)(440)h | | 18x-5+4x-2+6x=77 | | 3x+4=x+4 | | -1+6+3+-3= | | -45=3d+2d | | 2(p+1)=6 | | -45=3d+2f | | 18=3x-2 | | 810x-x^2=3240 | | c-279=402 | | 3a-5a=24 | | 3a-51=24 | | w^2=5 | | [(8m^2+3m-6)-(5m^2-5m+9)]-(m^2+m+2)= | | 18=2(18) | | -2+6v=64 | | 2y(9y^2+12y+4)=0 | | -12x+9y=24 | | 0.1(x+50)+0.3x=9 | | (x-y)+(x+y)=130 | | /2x-3/=13 | | (2x-10)+(x+30)=110 | | 10x+12=3x+57.5 | | y^2-x^2-10y-12x-36=0 | | 4y^2=5.76 | | -5x-6y=29 | | 10x+112=3x+57.5 | | V+2=-5+1+4v+9 | | 4y=2x+4 | | 700=3.14r^2 |

Equations solver categories