x(.15)+21=x(.20)

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Solution for x(.15)+21=x(.20) equation:


Simplifying
x(0.15) + 21 = x(0.20)

Reorder the terms for easier multiplication:
0.15x + 21 = x(0.20)

Reorder the terms:
21 + 0.15x = x(0.20)

Reorder the terms for easier multiplication:
21 + 0.15x = 0.20x

Solving
21 + 0.15x = 0.20x

Solving for variable 'x'.

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

Add '-0.20x' to each side of the equation.
21 + 0.15x + -0.20x = 0.20x + -0.20x

Combine like terms: 0.15x + -0.20x = -0.05x
21 + -0.05x = 0.20x + -0.20x

Combine like terms: 0.20x + -0.20x = 0.00
21 + -0.05x = 0.00

Add '-21' to each side of the equation.
21 + -21 + -0.05x = 0.00 + -21

Combine like terms: 21 + -21 = 0
0 + -0.05x = 0.00 + -21
-0.05x = 0.00 + -21

Combine like terms: 0.00 + -21 = -21
-0.05x = -21

Divide each side by '-0.05'.
x = 420

Simplifying
x = 420

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