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

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

Doubtly Asked 25 Oct 2026 ssc 10th Save WhatsApp Report

1 answer

Best answer

Answer: \(x + y = 1\)

Adding the two equations: \((15x + 17y) + (17x + 15y) = 21 + 11\), i.e. \(32x + 32y = 32\).

Dividing by 32, \(x + y = 1\).

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

Was this answer helpful?