Question

oi será que pode-me ajudar por favor​

Answer 1

a) x x x + 7

--- + --- = -------

2 3 3

3x + 2x = 2x + 14

-----------------------

6

3x + 2x = 2x + 14

3x + 2x - 2x = 14

3x = 14

x = 14

---- ou 4,66

3

b) x + 2 x + 1

------- + ------- = 6

6 4

4x + 8 + 6x + 6

----------------------- = 6

24

4x + 8 + 6x + 6 = 6 . 24

4x + 8 + 6x + 6 = 144

4x + 6x = 144 - 8 - 6

10x = 144 - 14

10x = 130

x = 130

-----

10

x = 13

c) x - 2 x + 1

------- - ------- = 4

3 4

4 (x - 2) - 3 (x + 1)

------------------------ = 4

12

4 (x - 2) - 3 (x + 1) = 4 . 12

4x - 8 - 3x - 3 = 48

4x - 3x = 48 + 8 + 3

x = 59

d) x - 1 x - 2 x - 3

------ + ------- = ------

2 3 4

6 (x - 1) + 4 (x - 2) = 3 (x - 3)

--------------------------------------

12

6 (x - 1) - 4 (x - 2) = 3 (x - 3)

6x - 6 - 4x + 8 = 3x - 9

6x - 4x - 3x = - 9 + 6 - 8

6x - 7x = - 17 + 6

x = - 11