Question

explica los numeros que satisfacen cada igualdad
a. (- 0,5). ( ) = 5
b. 100 . ( ) = 3,75
c. 3/5 / ( ) = 12
d. 1/2 ( / ) = -1/8
e. ( - 15/7 ) / ( / ) = 45/7
f. ( /) / ( -13/ 6) = 2/9
g. 0,75 / ( ) = 0,25
h. ( -0,8) / ( ) = -2
ayudenme por favor

Answer 1

a. (- 0,5). ( x ) = 5 
x = 5 / - 0,5 =  - 10 
x= - 10.

b. 100 . (  x ) = 3,75
x = 3,75 / 100 = 0,0375
x = 0,0375

c. 3/5 / ( x ) = 12
x = (3/5) / 12 = 60 / 3 = 20
x = 20

d. 1/2 ( x /  y ) = -1/8
x / 2 y = -1 / 8
x = -1
y =  4
x / y = -1 / 4

e. ( - 15/7 ) / (x /y ) = 45/7
$\frac{ \frac{-15}{7} }{ \frac{x}{y} } = \frac{-15 . y}{7 . x} = \frac{-15 . (-3)}{7 . (1)} = \frac{45}{7}$
x = -3
y = 1
x / y = -3 / 1

f. ( x/y) / ( -13/ 6) = 2/9
$\frac{ \frac{x}{y} }{ \frac{-13}{16} } = \frac{2}{9}$

$\frac{x}{y} = \frac{2}{9} * \frac{-13}{16} = \frac{-26}{144} = \frac{-13}{72}$

$\frac{ \frac{-13}{72} }{ \frac{-13}{16} } = \frac{16}{72} = \frac{2}{9}$

x/y = (-13)/(72)

g. 0,75 / ( x ) = 0,25
 x = 0,75 / 0,25 = 3
x = 3

h. ( -0,8) / ( x ) = -2
x = -0,8 / -2 = 0,4
x = 0,4