Question

Va rog repedee dau coroana

Answer 1

Răspuns:

b)x-2/x=7/13

(x-2)x13=7x

13x-26=7x

6x=26

x=4,(3)

c)3x+4/x+5=5/3

(x+5)x5=(3x+4)x3

5x+25=9x+12

25-12=9x-5x

13=4x

x=3,25

d)4x-3/11=2x+5/7

(2x+5)x11=(4x-3)x7

22x+55=28x-21

55-21=28x-22x

29=6x

x=4,8(3)

e)x+1/0,5=2x+8/4

(2x+8)x0,5=(x+1)x4

x+4=4x+4

4-4=4x-1

0=3x

x=0