1x-81-21x=-1

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Solution for 1x-81-21x=-1 equation:


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

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

Combine like terms: 1x + -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

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