Question

Пожалуйста помогите решать

Answer 1

1. х=3.5*4.8/2*4=16.8/2.4=7

2. х=(2 целых 1/3)*9.2/2.3=7*92/(3*23)=7*4/3=28/3=9 целых 1/3

3. х=(7.2*4 целых 1/3)/2.4=3*4 целых 1/3=12 целых 3/3=13

4. (4 целых 2/7):(2целых 1/7)=30/7:(15/7)=30*7/(7*15)=2

3.2/х=2

х=3.2/2

х=1.6

Answer 2

$\displaystyle \tt 1). \ \ 3,5:x=2,4:4,8\\\\{} \ \ \ \ \ \ 2,4x=3,5\cdot4,8\\\\{} \ \ \ \ \ \ x=7\\\\2). \ \  x:2\frac{1}{3}=9,2:2,3\\{} \ \ \ \ \ \ 2,3x=9,2\cdot2\frac{1}{3}\\\\{} \ \ \ \ \ \ x=9\frac{1}{3}\\\\3). \ \ 7,2:2,4=x:4\frac{1}{3}\\\\{} \ \ \ \ \ \ 2,4x=7,2\cdot4\frac{1}{3}\\\\{} \ \ \ \ \ \ x=13\\\\4). \ \ 4\frac{2}{7}:2\frac{1}{7}=3,2:x\\\\{} \ \ \ \ \ \ 4\frac{2}{7}x=2\frac{1}{7}\cdot3,2\\\\{} \ \ \ \ \ \ x=\frac{15}{7}\cdot\frac{32}{10}\cdot\frac{7}{30}\\\\{} \ \ \ \ \ \ x=1,6$