If \(17x + 15y = 11\) and \(15x + 17y = 21\), then find the value of \(x - y\).

Q.1 (B)(i) If \(17x + 15y = 11\) and \(15x + 17y = 21\), then find the value of \(x - y\).

Doubtly Asked 25 Oct 2026 ssc 10th Save WhatsApp Report

1 answer

Best answer

Answer: \(x - y = -5\)

Subtracting the second equation from the first:

\((17x + 15y) - (15x + 17y) = 11 - 21\)

\(2x - 2y = -10\)

Dividing by 2, \(x - y = -5\).

Doubtly AI · 25 Oct 2026 AI-verified · Oct 2026 Report

Was this answer helpful?