Question

Copia y completa las igualdades.
a)1/2+ • /5=7/10
b)3/8+ • /4=5/8
c)4/ • -2/5=6/35
d) • /6-1/3=1/6
AYUDITA PLZ

Answer 1

RESOLUCIÓN :

° = x


a)

$\frac{1}{2}+\frac{x}{5}=\frac{7}{10}$

$\frac{1}{2}+\frac{x}{5}-\frac{1}{2}=\frac{7}{10}-\frac{1}{2}$

$\frac{x}{5}=\frac{1}{5}$

$\boxed{x =1}}$

b)


$\frac{3}{8}+\frac{x}{4}=\frac{5}{8}$

$\frac{3}{8}+\frac{x}{4}-\frac{3}{8}=\frac{5}{8}-\frac{3}{8}$

$\frac{x}{4}=\frac{1}{4}$

$\boxed{x=1}}$

c)

$\frac{4}{x}-\frac{2}{5}=\frac{6}{35}$

$\frac{4}{x}\cdot \:35x-\frac{2}{5}\cdot \:35x=\frac{6}{35}\cdot \:35x$

$140-14x=6x$

$140 = 6x +14x 140 = 20 x 140 /20 = x \boxed{x = 7}}$

d)

$\frac{x}{6}-\frac{1}{3}=\frac{1}{6}$

$\frac{x}{6}-\frac{1}{3}+\frac{1}{3}=\frac{1}{6}+\frac{1}{3}$

$\frac{x}{6}=\frac{1}{2}$

$\boxed{x = 3}}$