(100-a)+(100-b)+(100-c)=100

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Solution for (100-a)+(100-b)+(100-c)=100 equation:


Simplifying
(100 + -1a) + (100 + -1b) + (100 + -1c) = 100

Remove parenthesis around (100 + -1a)
100 + -1a + (100 + -1b) + (100 + -1c) = 100

Remove parenthesis around (100 + -1b)
100 + -1a + 100 + -1b + (100 + -1c) = 100

Remove parenthesis around (100 + -1c)
100 + -1a + 100 + -1b + 100 + -1c = 100

Reorder the terms:
100 + 100 + 100 + -1a + -1b + -1c = 100

Combine like terms: 100 + 100 = 200
200 + 100 + -1a + -1b + -1c = 100

Combine like terms: 200 + 100 = 300
300 + -1a + -1b + -1c = 100

Solving
300 + -1a + -1b + -1c = 100

Solving for variable 'a'.

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

Add '-300' to each side of the equation.
300 + -1a + -1b + -300 + -1c = 100 + -300

Reorder the terms:
300 + -300 + -1a + -1b + -1c = 100 + -300

Combine like terms: 300 + -300 = 0
0 + -1a + -1b + -1c = 100 + -300
-1a + -1b + -1c = 100 + -300

Combine like terms: 100 + -300 = -200
-1a + -1b + -1c = -200

Add 'b' to each side of the equation.
-1a + -1b + b + -1c = -200 + b

Combine like terms: -1b + b = 0
-1a + 0 + -1c = -200 + b
-1a + -1c = -200 + b

Add 'c' to each side of the equation.
-1a + -1c + c = -200 + b + c

Combine like terms: -1c + c = 0
-1a + 0 = -200 + b + c
-1a = -200 + b + c

Divide each side by '-1'.
a = 200 + -1b + -1c

Simplifying
a = 200 + -1b + -1c

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