Question

solve 3m-5n=-1; 2m-n= -3
thank you

Answer 1

Step-by-step explanation:

$3m - 5n = - 1 \: \: \: and \: 2m - n = - 3 \\ \\ 2m - n = - 3 \\ n = 2m + 3 \\ by \: substituting \: the \: value \: of \: n \: in \: \\ first \: equation \:we \: get \: \\ 3m \: - 5(2m + 3) = - 1 \\ 3m - 10m - 15 = - 1 \\ - 7m - 15 = - 1 \\ 7m + 15 = 1 \\ 7m = - 14 \\ m = - 2,</p><p>n =2m+3, </p><p>n = -4+3, </p><p> n= -1.$