Question

ma puteti ajuta si pe mine la exerciiul asta? afla numerele necunoscute:a) 36:9xd=28 ,b) (e:8)+18=7x3 ,c)(32:f)-6=12:6 d) 9xa=72 ,e) 42:b=7 ,f) c:9=5

Answer 1

a) 36 = 28 * 9d
252d = 36
d = 36/252
d = 1/7
b) e : 8 = 21 - 18
e = 3 * 8
e = 24
c) 32 : f = 2 + 6
32 = 8f
f = 32/8
f = 4
d)9a = 72          a = 72/9                 a = 8
e) 42 = 7b         b = 42/7                 b = 6
f) c = 5 * 9        c = 45    

Answer 2

36 : 9 x d = 28
4x d = 28
d = 28 : 4
d = 7

( e : 8 ) + 18 = 7 x3
e : 8 = 21 - 18
e : 8 = 3
e = 3 x8
e = 24

( 32 : f ) - 6 = 12 :6
32 : f = 2 + 6
32 : f = 8
f = 32 : 8
f = 4

9 x a = 72
a = 72 : 9
a = 8

42 : b = 7
b = 42 : 7
b = 6

c : 9 = 5
c = 9x5
c = 45