x(0.4)-10x(0.2)+9=0

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Solution for x(0.4)-10x(0.2)+9=0 equation:


Simplifying
x(0.4) + -10x(0.2) + 9 = 0

Reorder the terms for easier multiplication:
0.4x + -10x(0.2) + 9 = 0

Reorder the terms for easier multiplication:
0.4x + -10 * 0.2x + 9 = 0

Multiply -10 * 0.2
0.4x + -2x + 9 = 0

Reorder the terms:
9 + 0.4x + -2x = 0

Combine like terms: 0.4x + -2x = -1.6x
9 + -1.6x = 0

Solving
9 + -1.6x = 0

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + -1.6x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1.6x = 0 + -9
-1.6x = 0 + -9

Combine like terms: 0 + -9 = -9
-1.6x = -9

Divide each side by '-1.6'.
x = 5.625

Simplifying
x = 5.625

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