Question

1)Calcule as raízes das equações abaixo.

a) 7x + 4 – 2x = 20 + 9

b) 8x + 10 = x – 2 + 3 x

c) 17x – 3x + 5 = 5x – 23

d) 20x – 9 = 13 – 24x​

Answer 1

Resposta:

a) 7x - 2x = 29 - 4

5x = 25

x = 25/5

x = 5

b) 8x + 10 = x – 2 + 3 x

8x - 4x= -2-10

4x = -12

x = -12/4

x=-3

c) 17x – 3x + 5 = 5x – 23

17x - 3x - 5x = - 23 - 5

17x - 8x = - 28

9x= -28

x = -28/9

x = -3,1

d) 20x – 9 = 13 – 24x

20x + 24x = 13+9

44x = 22

x = 22/44

x = 0,5