Question

a/5a-7b*(7/a-5/b) help me

Answer 1

$frac{a}{5a} - 7b times ( frac{7}{a} - frac{5}{b}) = \ 1) frac{7b - 5a}{ab} \ 2) - frac{7b}{1} times frac{(7b - 5a)}{ab} = - frac{7b(7b - 5a) }{ab} \3) frac{ab}{5ab} - frac{5( 7b(7b - 5a ))}{5ab} = frac{ab - 35b(7b - 5a)}{5ab} = frac{(a - 35)(7b - 5a)}{5a} =$