Respuesta :

Answer:

Step-by-step explanation:

1.  12/3x = 1/2

4/1x = 1/2

4/1x = 1/2 / 4/1

1/2 x 1/4 ,  x = 1/8.

2).    x / 2.5 = 1. 75/ 1

cross multiply to get

x = 2.5 x 1.75

x = 4.375
The first one is 3/10 the second one is 35/8

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