Question

Alguem Ajuda A Minha Prima ??

Answer 1

a)
7  =  14
9       x

7x = 9.14
x = 9.14
         7
x = 9.2
x = 18
------------------------------------
b)
4  = x
7    28

4.28 = 7x
4.28  = x
    7

4.4 = x
16 = x
x = 16
-----------------------------------
c)
7  =   x
2      12

7.12  =  x
    2
7.6 = x
42 = x
x = 42
--------------------------------
d)
15  =  x
30      2

15.2  = x
  30

30 = x
30

1 = x
x = 1
-----------------------
e)
3    =  9
11       x

3x = 11.9
3x = 99
x = 99/3
x = 33
--------------------------------------
f)
1  =  x
8      40

1.40 = 8x
40 = 8x
8x = 40
x = 40/8
x = 5
------------------------------------------
g)
 6    =   1
18        x

6x = 18
x = 18/6
x = 3
---------------------------------------
h)
40   =  10
12        x 

40x = 10.12
40x = 120
x = 120
       40
x = 3