Question

9a + 7b = 13 then b =?​

Answer 1

$question = 9a + 7b = 13 \: then \: b =? \\ solution. \\ 9a + 7b = 13 ...(1)\\ 9a = 13 - 7b \\ a = (\frac{13 - 7b}{9} ) \\ put \: the \: value \: of \: a \: in \: (1)equation. \\ 9(\frac{13 - 7b}{9} ) + 7b = 13 \\ \frac{117 - 63b}{9} + 7b = 13 \\ \frac{117 - 63b +63 b}{9} = 13 \\ \frac{117}{9} = 13 \\ 13 = 13 \\ or \: 0 = 0 \\ is \: the \: answer...$

hlo dear galt hai tho report this answer...

i think sahi ho...