x-81-21x=-1

Simple and best practice solution for x-81-21x=-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 x-81-21x=-1 equation:


Simplifying
x + -81 + -21x = -1

Reorder the terms:
-81 + x + -21x = -1

Combine like terms: x + -21x = -20x
-81 + -20x = -1

Solving
-81 + -20x = -1

Solving for variable 'x'.

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

Add '81' to each side of the equation.
-81 + 81 + -20x = -1 + 81

Combine like terms: -81 + 81 = 0
0 + -20x = -1 + 81
-20x = -1 + 81

Combine like terms: -1 + 81 = 80
-20x = 80

Divide each side by '-20'.
x = -4

Simplifying
x = -4

See similar equations:

| =2x+8 | | -r-3=1-3r | | 4x+2=5x | | a+23=31 | | 2x+9=6x+51 | | x^4-20x+64=0 | | x^2+6x-1=0 | | 12x-8=136 | | 2x(3.7-9.1)= | | 17h-47+6h=160 | | 1.2m=-0.72 | | n+4.7=12.2 | | 75w^2-48=0 | | 14+4k=2k-11 | | ax-ay+bx-by= | | 3(x^2+4)+4=52 | | y-5.6=-7.2 | | -8=27+t | | (8x^2-18)(x^2-9x+8)=0 | | (8x^2-18)(x^2-9x+8)=y | | 10x^2-13x-3=0 | | 12x^3-6x^2-2x+1= | | 15x+8y=165 | | 27a-11=-25+23a | | 27a+11=-25+23a | | 4-2u=3-3u | | y-5.6=7.2 | | y=4(3)-3 | | 11z+3-4z=5z | | y=4(1)-3 | | 3(3p+5)=3p | | y=4(-1)-3 |

Equations solver categories