-21+12=3(n-1)

Simple and best practice solution for -21+12=3(n-1) 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+12=3(n-1) equation:


Simplifying
-21 + 12 = 3(n + -1)

Combine like terms: -21 + 12 = -9
-9 = 3(n + -1)

Reorder the terms:
-9 = 3(-1 + n)
-9 = (-1 * 3 + n * 3)
-9 = (-3 + 3n)

Solving
-9 = -3 + 3n

Solving for variable 'n'.

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

Add '-3n' to each side of the equation.
-9 + -3n = -3 + 3n + -3n

Combine like terms: 3n + -3n = 0
-9 + -3n = -3 + 0
-9 + -3n = -3

Add '9' to each side of the equation.
-9 + 9 + -3n = -3 + 9

Combine like terms: -9 + 9 = 0
0 + -3n = -3 + 9
-3n = -3 + 9

Combine like terms: -3 + 9 = 6
-3n = 6

Divide each side by '-3'.
n = -2

Simplifying
n = -2

See similar equations:

| =2yz-3x | | 4x+9x+7x=160 | | 15=4n-3-2 | | Ax+2y=10 | | V^2(-4)= | | 3(2z-1)-3(2-3z)=12 | | 4(2x-3)=3+8x-11whatisx | | f(x)=3x^2+9x-9 | | Ax+7y=14 | | x^2+5x+176=0 | | 3(2z-1)-3(2-3)=12 | | 2a^2b+7ab+3b= | | x+x+0.09+x+0.09+0.35=10.40 | | f(x)=x^2-3x-28 | | 10x+7y=70 | | 19.50x=725+10.5x | | 8y+5y+2y=60 | | -9+t=12 | | -3v(5v)= | | -6y+8=-6y+8 | | 2x-18x-33=-7 | | 70-10x^2=0 | | -84+8x=-3x+26 | | 4+3(2x+5)=6x+20 | | 3.5(14q+4.5)-3q=9 | | r-6-2r=6-7r | | 5x+6x+x=72 | | -81+7x=-2x+36 | | 9r^2-5r-56=0 | | -2(t-3)=10-2t | | 2(b+3)=96 | | 5logx=-10 |

Equations solver categories