84-6x=21x+15

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Solution for 84-6x=21x+15 equation:


Simplifying
84 + -6x = 21x + 15

Reorder the terms:
84 + -6x = 15 + 21x

Solving
84 + -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.
84 + -6x + -21x = 15 + 21x + -21x

Combine like terms: -6x + -21x = -27x
84 + -27x = 15 + 21x + -21x

Combine like terms: 21x + -21x = 0
84 + -27x = 15 + 0
84 + -27x = 15

Add '-84' to each side of the equation.
84 + -84 + -27x = 15 + -84

Combine like terms: 84 + -84 = 0
0 + -27x = 15 + -84
-27x = 15 + -84

Combine like terms: 15 + -84 = -69
-27x = -69

Divide each side by '-27'.
x = 2.555555556

Simplifying
x = 2.555555556

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