Question

N+5 - n-10=1 The n=5 and n-10 are in square root symbols

Answer 1

$D:x\geq-5 \wedge x\geq10\\ D:x\geq10\\\\ \sqrt{n+5}-\sqrt{n-10}=1\\ \sqrt{n+5}=1+\sqrt{n-10}\\ n+5=1+2\sqrt{n-10}+n-10\\ 2\sqrt{n-10}=14\\ \sqrt{n-10}=7\\ n-10=49\\ n=59$