Question

va rog sa ma ajutati dau 20 puncte

Answer 1

Răspuns

Explicație pas cu pas:

( a × 5 ) : 2 = 40 : 4

a × 5 = 10 × 2

a × 5 = 20

a = 20 : 5

a = 4

____________

42 : ( d × 3 ) = 21 : 3

d × 3 = 42 : 7

d × 3 = 6

d = 6 : 3

d = 2

___________

( b : 3 ) × 6 = 52 - 4

( b : 3 ) × 6 = 48

b : 3 = 48 : 6

b : 3 = 8

b = 8 × 3

b = 24

_________

9 × ( c : 6 ) = 6 × 6

c : 6 = 36 : 9

c : 6 = 4

c = 4 × 6

c = 24

____________

72 - 40 = ( f : 3 ) × ( 40 : 5 )

( f : 3 ) × 8 = 32

f : 3 = 32 : 8

f : 3 = 4

f = 4 × 3

f = 12

Answer 2

(5×a):2=40:4
(5×a):2=10
5×a=10×2
5×a=20
a=20:5
a=4

(b:3)×6=52-4
(b:3)×6=48
b:3=48:6
b:3=8
b=8×3
b=24

9×(c:6)=6×6
9×(c:6)=36
c:6=36:9
c:6=4
c=6×4
c=24

42: (d×3)=21:3
42: (d×3)=7
d×3=42:7
d×3=6
d=6:3
d=2

60-(e×9)=30:5
60-(e×9)=6
e×9=60-6
e×9=54
e=54:9
e=6

72-40=(f:3)×(40:5)
32=(f:3)×8
f:3=32:8
f:3=4
f=3×4
f=12

Succes :3