15x+64=9x-21

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Solution for 15x+64=9x-21 equation:


Simplifying
15x + 64 = 9x + -21

Reorder the terms:
64 + 15x = 9x + -21

Reorder the terms:
64 + 15x = -21 + 9x

Solving
64 + 15x = -21 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
64 + 15x + -9x = -21 + 9x + -9x

Combine like terms: 15x + -9x = 6x
64 + 6x = -21 + 9x + -9x

Combine like terms: 9x + -9x = 0
64 + 6x = -21 + 0
64 + 6x = -21

Add '-64' to each side of the equation.
64 + -64 + 6x = -21 + -64

Combine like terms: 64 + -64 = 0
0 + 6x = -21 + -64
6x = -21 + -64

Combine like terms: -21 + -64 = -85
6x = -85

Divide each side by '6'.
x = -14.16666667

Simplifying
x = -14.16666667

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