Question

pfvv preciso isso pra hoje socorro

Answer 1

Resposta:

a) 3 = x

   4   8

4x = 24

x = 24/4

x = 6

b) 12 = 2x - 2

   21     3x + 1

36x + 12 = 42x - 42

-42+36x = -42 -12

-6x = -54  *(-1)

x = 54/6

x = 9

c) 10 = 3x + 1

    15   5x -2

50x - 20 = 45x + 15

50x - 45x = 15 +20

5x = 35

x= 35/5

x = 7

d) x+1 = 24

   x-5    6

6x + 6 = 24x -120

-24x + 6x = -120 -6

- 18x = -126  *(-1)

x = 126/18

x = 7