Question

24mn-3n+40n-5 m= -2 2/3 n=0.2

Answer 1

$24mn - 3n + 40n - 5m = \ = 24mn + 37n - 5m = \ = n(24m + 37) - 5m$
При m = -8/3, n=0.2:
$0.2( frac{24 times 8}{3} + 37) - frac{5 times 8}{3} = \ = 0.2(64 + 37) - frac{40}{3} = \ = (0.2 times 101) - frac{40}{3} = \ = 20.2 - frac{40}{3} = frac{101}{5} - frac{40}{3} = \ = frac{103}{15}$

Answer 2

4,8m-0.6+8-5m=-0.2m+7.4
-0.2•(-2 2/3)+7.4=16 2/3