7-(5-0.5n)=9

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Solution for 7-(5-0.5n)=9 equation: 


Simplifying
7 + -1(5 + -0.5n) = 9
7 + (5 * -1 + -0.5n * -1) = 9
7 + (-5 + 0.5n) = 9

Combine like terms: 7 + -5 = 2
2 + 0.5n = 9

Solving
2 + 0.5n = 9

Solving for variable 'n'.

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

Add '-2' to each side of the equation.
2 + -2 + 0.5n = 9 + -2

Combine like terms: 2 + -2 = 0
0 + 0.5n = 9 + -2
0.5n = 9 + -2

Combine like terms: 9 + -2 = 7
0.5n = 7

Divide each side by '0.5'.
n = 14

Simplifying
n = 14

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