Question

va rog ajutati maaaa

dau coroana si inima​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

1/3 + 1/4 = 4/12 + 3/12 = 7/12

x/12 = (7/12)/7

7x = 12*7/12

7x = 7

x = 7/7 = 1

b)

1/5 - 1/5 : 5 = 1/5 - 1/5*1/5 = 1/5 - 1/25 = 5/25 - 1/25 = 4/25

(4/25)/4 = x/75

75*4/25 = 4*x

3*4 = 4*x

x = 3*4/4 = 3