(100*.05)21=X

Solution for (100*.05)21=X equation:

Simplifying
(100 * 0.05) * 21 = X

Multiply 100 * 0.05
(5) * 21 = X

Multiply 5 * 21
105 = X

Solving
105 = X

Solving for variable 'X'.

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

Add '-1X' to each side of the equation.
105 + -1X = X + -1X

Combine like terms: X + -1X = 0
105 + -1X = 0

Add '-105' to each side of the equation.
105 + -105 + -1X = 0 + -105

Combine like terms: 105 + -105 = 0
0 + -1X = 0 + -105
-1X = 0 + -105

Combine like terms: 0 + -105 = -105
-1X = -105

Divide each side by '-1'.
X = 105

Simplifying
X = 105