.05n+.10(n+9)+.25(n+30)=10.00

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Solution for .05n+.10(n+9)+.25(n+30)=10.00 equation:


Simplifying
0.05n + 0.10(n + 9) + 0.25(n + 30) = 10.00

Reorder the terms:
0.05n + 0.10(9 + n) + 0.25(n + 30) = 10.00
0.05n + (9 * 0.10 + n * 0.10) + 0.25(n + 30) = 10.00
0.05n + (0.9 + 0.10n) + 0.25(n + 30) = 10.00

Reorder the terms:
0.05n + 0.9 + 0.10n + 0.25(30 + n) = 10.00
0.05n + 0.9 + 0.10n + (30 * 0.25 + n * 0.25) = 10.00
0.05n + 0.9 + 0.10n + (7.5 + 0.25n) = 10.00

Reorder the terms:
0.9 + 7.5 + 0.05n + 0.10n + 0.25n = 10.00

Combine like terms: 0.9 + 7.5 = 8.4
8.4 + 0.05n + 0.10n + 0.25n = 10.00

Combine like terms: 0.05n + 0.10n = 0.15n
8.4 + 0.15n + 0.25n = 10.00

Combine like terms: 0.15n + 0.25n = 0.4n
8.4 + 0.4n = 10.00

Solving
8.4 + 0.4n = 10.00

Solving for variable 'n'.

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

Add '-8.4' to each side of the equation.
8.4 + -8.4 + 0.4n = 10.00 + -8.4

Combine like terms: 8.4 + -8.4 = 0.0
0.0 + 0.4n = 10.00 + -8.4
0.4n = 10.00 + -8.4

Combine like terms: 10.00 + -8.4 = 1.6
0.4n = 1.6

Divide each side by '0.4'.
n = 4

Simplifying
n = 4

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