Question

помогите нужно сделать математику!​

Answer 1

$1 frac{2}{7} y - frac{1}{2} = 5.2 times 2.5 = 13 \ 1 frac{2}{7} y = 13 + frac{1}{2} = 13 frac{1}{2}$

$y = 13 frac{1}{2} div 1 frac{2}{7} = frac{27}{2} div frac{9}{7} \ = frac{27}{2} times frac{7}{9} = frac{21}{2} = 10 frac{1}{2} = 10.5$