x-.4x=72

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Solution for x-.4x=72 equation: 


Simplifying
x + -0.4x = 72

Combine like terms: x + -0.4x = 0.6x
0.6x = 72

Solving
0.6x = 72

Solving for variable 'x'.

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

Divide each side by '0.6'.
x = 120

Simplifying
x = 120

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