Question

If the system of equations 3x + 4y = 12 and (m + n)x + 2(m - n)y = 5m - 1 have infinitely many solutions then choose the correct statement (A)n=5m (B)m=5n (C) m+5n=0 (D) 5m+n=0​

Answer 1

$5m+n=0$

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