Question

Решите уравнения
3) 7/8 * (-4/9)=2/7x
4) 3/5x + (9x/3)=10

Answer 1

$1)frac{7}{8} times ( - frac{4}{9} ) = frac{2}{7} x \ \ frac{7}{2} times ( - frac{1}{9} ) = frac{2}{7} x \ \ - frac{7}{18} = frac{2}{7} x \ \ x = - frac{7}{18} div frac{2}{7} \ \ x = - frac{7}{18} times frac{7}{2} \ \ x = - frac{49}{36} = - 1 frac{13}{36} \ \ \ \ 2) frac{3}{5} x + ( frac{9x}{3} ) = 10 \ \ 9x + 45x = 150 \ \ 54x = 150 \ \ x = 150 div 54 \ \ x = frac{25}{9} = 2 frac{7}{9}$

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Answer 2

Надеюсь вам поможет