Question

Halla los términos desconocidos : a. 1/4 = 3/12 = 7/a b. 1/4 = 3/12 = 7/a c: 2/9 = 6/a = b/45 d: a/3 = b/15 = c/21 ayúdeme por favor

Answer 1

Respuesta:

a.

$\frac{1}{4} = \frac{1 \times 7}{4 \times 7} = \frac{7}{a}$

a=28

b = 28

c.

$\frac{2}{9} = \frac{2 \times 3}{9 \times 3} = \frac{6}{a} = \frac{2 \times 5}{9 \times 5} = \frac{b}{45}$

a = 27

b = 10

d.

a=a

b=a•5=5a

c=a•7=7a