100-20-x=25

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Solution for 100-20-x=25 equation: 


Simplifying
100 + -20 + -1x = 25

Combine like terms: 100 + -20 = 80
80 + -1x = 25

Solving
80 + -1x = 25

Solving for variable 'x'.

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

Add '-80' to each side of the equation.
80 + -80 + -1x = 25 + -80

Combine like terms: 80 + -80 = 0
0 + -1x = 25 + -80
-1x = 25 + -80

Combine like terms: 25 + -80 = -55
-1x = -55

Divide each side by '-1'.
x = 55

Simplifying
x = 55

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