Question

Resolver puntos 383, 385, 406, 414

Answer 1

Respuesta:

383.

1,5 × C = 7,5

   $\frac{15}{10}.C = \frac{75}{10}$

   $\frac{15.C}{10} = \frac{75}{10}$

   15.C = 75

        C = 5

385.

$\frac{4}{9} x + \frac{3}{4} = -\frac{1}{2}$

$\frac{4x}{9}=-\frac{1}{2} - \frac{3}{4}$

$\frac{4x}{9}=\frac{-1.4 + 2.-3}{2.4}$

$\frac{4x}{9}= \frac{-4-6}{8}$

$\frac{4x}{9}= \frac{-10}{8}$

4x.8 = 9.-10

32x = -90

    x = $-\frac{90}{32}$

    x = $-\frac{45}{16}$

    x = -2,8125

406.

a = numero

a - $\frac{85}{4}$ = - $\frac{12}{5}$

a = $-\frac{12}{5}+\frac{85}{4}$

a = $\frac{-12.4 + 5.85}{5.4}$

a = $\frac{-48 + 425}{20}$

a = $\frac{377}{20}$

a = 18,85

414.

a = lado

a + $\frac{3}{4}$ = $\frac{8}{7}$

a = $\frac{8}{7}-\frac{3}{4}$

a = $\frac{8.4-7.3}{7.4}$

a = $\frac{32-21}{28}$

a = $\frac{11}{28}$