100=.7X-X

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Solution for 100=.7X-X equation:


Simplifying
100 = 0.7X + -1X

Combine like terms: 0.7X + -1X = -0.3X
100 = -0.3X

Solving
100 = -0.3X

Solving for variable 'X'.

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

Add '0.3X' to each side of the equation.
100 + 0.3X = -0.3X + 0.3X

Combine like terms: -0.3X + 0.3X = 0.0
100 + 0.3X = 0.0

Add '-100' to each side of the equation.
100 + -100 + 0.3X = 0.0 + -100

Combine like terms: 100 + -100 = 0
0 + 0.3X = 0.0 + -100
0.3X = 0.0 + -100

Combine like terms: 0.0 + -100 = -100
0.3X = -100

Divide each side by '0.3'.
X = -333.3333333

Simplifying
X = -333.3333333

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