If $tan(5x - 10^{0})$ = $cot(5y + 20^{0})$, the value of (x +y ) is

If $tan(5x - 10^{0})$ = $cot(5y + 20^{0})$, the value of (x +y ) is
1). $15^{0}$
2). $16^{0}$
3). $24^{0}$
4). $20^{0}$

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