Question

n-2×180/n = 90 please tell the ans​

Answer 1

$n - 2 \times \frac{180}{n} = 90 \\ \\ \frac{n(n - 2) \times 180}{n} = 90 \\ \\ ({n}^{2} - 2n) \times 180 = 90n \\ \\ {n}^{2} - 2n = \frac{90n}{180} \\ \\ {n}^{2} - 2n = \frac{1}{2} n \\ \\ 2 {n}^{2} - 4n = n \\ \\ 2 {n}^{2} = n + 4n \\ \\ 2 {n}^{2} = 5n \\ \\ 2n = 5 \\ \\ n = \frac{5}{2}$

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Answer 2

Answer:

n = 4

just simplify it

A a non-zero constant never equals zero