X-(0.3X)=420

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Solution for X-(0.3X)=420 equation: 


Simplifying
X + -1(0.3X) = 420

Remove parenthesis around (0.3X)
X + -1 * 0.3X = 420

Multiply -1 * 0.3
X + -0.3X = 420

Combine like terms: X + -0.3X = 0.7X
0.7X = 420

Solving
0.7X = 420

Solving for variable 'X'.

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

Divide each side by '0.7'.
X = 600

Simplifying
X = 600

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