9(4+5)=n

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Solution for 9(4+5)=n equation:


Simplifying
9(4 + 5) = n

Combine like terms: 4 + 5 = 9
9(9) = n

Multiply 9 * 9
81 = n

Solving
81 = n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
81 + -1n = n + -1n

Combine like terms: n + -1n = 0
81 + -1n = 0

Add '-81' to each side of the equation.
81 + -81 + -1n = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -1n = 0 + -81
-1n = 0 + -81

Combine like terms: 0 + -81 = -81
-1n = -81

Divide each side by '-1'.
n = 81

Simplifying
n = 81

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