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a fost răspuns

Rezolva proportiile urmatoare :
a)3x-1/4=0,5/3
b)4/5=3x+2/12,5

Răspuns :

a)

3 x - 1 / 4 = 0, 5 / 3

3 x - 0, 25 = 0, 1 ( 6 )

3 x = 0, 1 ( 6 ) + 0, 25

3 x = 0, 41 ( 6 )

x = 0, 41 ( 6 ) : 3

x = 0, 13 ( 8 )

b)

4 / 5 = 3 x + 2 / 12, 5

0, 8 = 3 x + 0, 16

3 x = 0, 8 - 0, 16

3 x = 0, 64

x = 0, 64 : 3

x = 0, 21 ( 3 )

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