21000=a+b(100)

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Solution for 21000=a+b(100) equation:


Simplifying
21000 = a + b(100)

Reorder the terms for easier multiplication:
21000 = a + 100b

Solving
21000 = a + 100b

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
21000 + -1a = a + -1a + 100b

Combine like terms: a + -1a = 0
21000 + -1a = 0 + 100b
21000 + -1a = 100b

Add '-21000' to each side of the equation.
21000 + -21000 + -1a = -21000 + 100b

Combine like terms: 21000 + -21000 = 0
0 + -1a = -21000 + 100b
-1a = -21000 + 100b

Divide each side by '-1'.
a = 21000 + -100b

Simplifying
a = 21000 + -100b

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