Question

Aflati numarul j repede va rog ca e ora 10 si nu mai pot!

Answer 1

(30+ 4j - 8)÷6=7
30 + 4j - 8 = 42( am inmultit 6 cu 7)
30 + 4j=42+8
30 + 4j = 50
4j =50-30
4j = 20
j= 20÷4=5

Answer 2

i) 54:i=7+7-5                         

54:i=9

i=54:9i=6

j)    (30+4 x j-8):6=7

(22+4 x j):6=7

22 + 4 x j=6 x 7

4 x j=42-22

4 x j=20

j= 20:4

j=5

k)   (64-32-12:k)-(40-20)=9

(32-12:k) - 20=9

32-12:k-20=9

12-12:k=9

12:k=12-9

12:k=3

k=12:3

k=4

l)   (95-45-9 x l).8=36-32

(50-9 x l):8=4

50-9 x l=4 x 8

50-9 x l=32

9 x l =50-32

9 x l=18

l=18:9

l=2