Question

СРОЧНО Помогите решить уравнения под цифрами 2),4)

Answer 1

здравствуй.

2)
$3 - ( frac{2}{9} m + frac{1}{6} ) = frac{m}{3} + 1.5 \ \ 3 - frac{2}{9} m - frac{1}{6} = frac{1}{3} m + 1.5 \ \ 2 frac{5}{6} - frac{2}{9} m = frac{3}{9} m + 1.5 \ \ - frac{2}{9} m - frac{3}{9} m = 1 frac{5}{10} - 2 frac{5}{6} \ \ - frac{5}{9} m = 1frac{15}{30} - 2 frac{25}{30} \ \ - frac{5}{9} m = - 1 frac{10}{30} \ \ - frac{5}{9} m = - 1 frac{1}{3} \ \ m = frac{4 times 9}{3 times 5} \ \ m = frac{12}{5} \ \ m = 2.4$

4)
$frac{2}{15} (b + 5) - frac{3}{10} (5b - 1) = 4 \ \ frac{2}{15} b + frac{2}{3} - 1.5b + 0.3 = 4 \ \ frac{4}{30} b - frac{45}{30} b = 4 - 0.3 - frac{2}{3} \ \ - frac{41}{30} b = 3 frac{1}{30} \ \ b = - frac{91 times 30}{30 times 41} \ \ b = - frac{91}{41} \ \ b = - 2 frac{9}{41}$


удачи в учебе.