x-.40x=2.1

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Solution for x-.40x=2.1 equation: 


Simplifying
x + -0.40x = 2.1

Combine like terms: x + -0.40x = 0.6x
0.6x = 2.1

Solving
0.6x = 2.1

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 = 3.5

Simplifying
x = 3.5

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