Question

pls say right answers and i will mark u brainlist​

Answer 1

Step-by-step explanation:

$15\div n + y \: \: - \: \: 5 \div n - y \: = - 2 \\ \\ 3 \times 5 \div n + y \: \: \: - 5 \div n - y = - 2 \: \\ \\ 5 { }^{2} \times 3 \div n {}^{2} - y {}^{2} = - 2 \\ \\ 25 \times 3 \div n {}^{2} - y {}^{2} = - 2 \\ \\ 75 \div n { }^{2} - y {}^{2} = - 2 \\ \\75 = n {}^{2} - y {}^{2} \times - 2 \\ \\ 75 \div 2 = - n {}^{2} + y { }^{2} \\ \\ 37.5 = y {}^{2} - n {}^{2} \\ \\ 37.5 + n {}^{2} = y { }^{2} \\ \\ 37.5 - y {}^{2} = - n {}^{2}$