100-X=25+4X

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Solution for 100-X=25+4X equation:


Simplifying
100 + -1X = 25 + 4X

Solving
100 + -1X = 25 + 4X

Solving for variable 'X'.

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

Add '-4X' to each side of the equation.
100 + -1X + -4X = 25 + 4X + -4X

Combine like terms: -1X + -4X = -5X
100 + -5X = 25 + 4X + -4X

Combine like terms: 4X + -4X = 0
100 + -5X = 25 + 0
100 + -5X = 25

Add '-100' to each side of the equation.
100 + -100 + -5X = 25 + -100

Combine like terms: 100 + -100 = 0
0 + -5X = 25 + -100
-5X = 25 + -100

Combine like terms: 25 + -100 = -75
-5X = -75

Divide each side by '-5'.
X = 15

Simplifying
X = 15

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