0.4x+0.25(129-x)=9

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Solution for 0.4x+0.25(129-x)=9 equation: 


Simplifying
0.4x + 0.25(129 + -1x) = 9
0.4x + (129 * 0.25 + -1x * 0.25) = 9
0.4x + (32.25 + -0.25x) = 9

Reorder the terms:
32.25 + 0.4x + -0.25x = 9

Combine like terms: 0.4x + -0.25x = 0.15x
32.25 + 0.15x = 9

Solving
32.25 + 0.15x = 9

Solving for variable 'x'.

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

Add '-32.25' to each side of the equation.
32.25 + -32.25 + 0.15x = 9 + -32.25

Combine like terms: 32.25 + -32.25 = 0.00
0.00 + 0.15x = 9 + -32.25
0.15x = 9 + -32.25

Combine like terms: 9 + -32.25 = -23.25
0.15x = -23.25

Divide each side by '0.15'.
x = -155

Simplifying
x = -155

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