Question

8) Sa se afle nr. natural X:

Va rog dati-mi si explicatie! Daca faceti pentru puncte va dau report. (Totul inafara de a, b, c)

Answer 1

a)x+5=12
x=12-5
x=7

b)x+12=36
x=36-12
x=24

c)13+x=18
x=18-13
x=5

d)3•(10-5)+x=24
3•5+x=24
15+x=24
x=24-15
x=9

e)8:(9-7)+x=16
8:2+x=16
4+x=16
x=16-4
x=12

f)x-4=10
x=10+4
x=14

g)x-12=6
x=12+6
x=18

h)x-(9+3)=18
x-12=18
x=12+18
x=30

i)x-(2•4-3)=7
x-(8-3)=7
x-5=7
x=7+5
x=12

j)x-(4:2+8)=6
x-(2+8)=6
x-10=6
x=10+6
x=16

k)8-x=5
x=8-5
x=3

l)19-x=11
x=19-11
x=8

m) (46+24)-x=45
70-x=45
x=70-45
x=25

n) (18:2+5)-x=6
(9+5)-x=6
14-x=6
x=14-6
x=8

o) (7•2-5)-x=5
(14-5)-x=5
9-x=5
x=9-5
x=4