218=4(10n+8)-9n

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Solution for 218=4(10n+8)-9n equation:


Simplifying
218 = 4(10n + 8) + -9n

Reorder the terms:
218 = 4(8 + 10n) + -9n
218 = (8 * 4 + 10n * 4) + -9n
218 = (32 + 40n) + -9n

Combine like terms: 40n + -9n = 31n
218 = 32 + 31n

Solving
218 = 32 + 31n

Solving for variable 'n'.

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

Add '-31n' to each side of the equation.
218 + -31n = 32 + 31n + -31n

Combine like terms: 31n + -31n = 0
218 + -31n = 32 + 0
218 + -31n = 32

Add '-218' to each side of the equation.
218 + -218 + -31n = 32 + -218

Combine like terms: 218 + -218 = 0
0 + -31n = 32 + -218
-31n = 32 + -218

Combine like terms: 32 + -218 = -186
-31n = -186

Divide each side by '-31'.
n = 6

Simplifying
n = 6

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