81-6x=21x+15

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Solution for 81-6x=21x+15 equation:


Simplifying
81 + -6x = 21x + 15

Reorder the terms:
81 + -6x = 15 + 21x

Solving
81 + -6x = 15 + 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
81 + -6x + -21x = 15 + 21x + -21x

Combine like terms: -6x + -21x = -27x
81 + -27x = 15 + 21x + -21x

Combine like terms: 21x + -21x = 0
81 + -27x = 15 + 0
81 + -27x = 15

Add '-81' to each side of the equation.
81 + -81 + -27x = 15 + -81

Combine like terms: 81 + -81 = 0
0 + -27x = 15 + -81
-27x = 15 + -81

Combine like terms: 15 + -81 = -66
-27x = -66

Divide each side by '-27'.
x = 2.444444444

Simplifying
x = 2.444444444

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