4x(x+9x)=1

Solution for 4x(x+9x)=1 equation:

Simplifying
4x(x + 9x) = 1

Combine like terms: x + 9x = 10x
4x(10x) = 1

Remove parenthesis around (10x)
4x * 10x = 1

Reorder the terms for easier multiplication:
4 * 10x * x = 1

Multiply 4 * 10
40x * x = 1

Multiply x * x
40x2 = 1

Solving
40x2 = 1

Solving for variable 'x'.

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

Divide each side by '40'.
x2 = 0.025

Simplifying
x2 = 0.025

Take the square root of each side:
x = {-0.158113883, 0.158113883}