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a fost răspuns

Rezolvati in Q+ ecuatiile : Va roggg!!!!!

b) 0.75(x+0.5)=4.875

Răspuns :

 0.75(x+0.5)=4.875x+0,5=4,125 x=3,625 
75/100 x ( X + 5/10) = 4875/1000
Dupa simplificari ramane :

3/4 x (X + 1/2 ) = 39/20

3/4 x ( 2X + 1)/2 = 39/20

(2X + 1)/ 2 = 39/20 : 3/4

(2X + 1)/2 = 39/20 x4/3

(2X + 1(/2 = 13/5

5 x (2X + 1) = 2 x 13

10X + 5 = 26

10 X = 21

X = 21 : 10

X =2,1.

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