15x*9x=21

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Solution for 15x*9x=21 equation: 


Simplifying
15x * 9x = 21

Reorder the terms for easier multiplication:
15 * 9x * x = 21

Multiply 15 * 9
135x * x = 21

Multiply x * x
135x2 = 21

Solving
135x2 = 21

Solving for variable 'x'.

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

Divide each side by '135'.
x2 = 0.1555555556

Simplifying
x2 = 0.1555555556

Take the square root of each side:
x = {-0.394405319, 0.394405319}

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