x-.7x=30

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Solution for x-.7x=30 equation: 


Simplifying
x + -0.7x = 30

Combine like terms: x + -0.7x = 0.3x
0.3x = 30

Solving
0.3x = 30

Solving for variable 'x'.

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

Divide each side by '0.3'.
x = 100

Simplifying
x = 100

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