20=a-(a*0.05)

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Solution for 20=a-(a*0.05) equation:


Simplifying
20 = a + -1(a * 0.05)

Reorder the terms for easier multiplication:
20 = a + -1(0.05a)

Remove parenthesis around (0.05a)
20 = a + -1 * 0.05a

Multiply -1 * 0.05
20 = a + -0.05a

Combine like terms: a + -0.05a = 0.95a
20 = 0.95a

Solving
20 = 0.95a

Solving for variable 'a'.

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

Add '-0.95a' to each side of the equation.
20 + -0.95a = 0.95a + -0.95a

Combine like terms: 0.95a + -0.95a = 0.00
20 + -0.95a = 0.00

Add '-20' to each side of the equation.
20 + -20 + -0.95a = 0.00 + -20

Combine like terms: 20 + -20 = 0
0 + -0.95a = 0.00 + -20
-0.95a = 0.00 + -20

Combine like terms: 0.00 + -20 = -20
-0.95a = -20

Divide each side by '-0.95'.
a = 21.05263158

Simplifying
a = 21.05263158

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