Question

18- resolva as equações:
A- x =8
2

B- x=-8
2

C- 3x=9
4

D- 2x= -10
3

Answer 1

a)

 x     =  8
----
 2

x = 2.8
x = 16

b)

 x     =   8
----
  2

x = 2.(-8)
x = - 16

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c)
3x    =  9
-----
  4

3x = 4.9
3x = 36
x = 36/3
x = 12

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d)

 2x     =  - 10
------ 
  3

2x = 3.(-10)
2x = - 30
x = - 30/2
x = - 15

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