Question

6)equações
a) x + 5 = 13
b) - 11 = 25
c) 14x - 6 = 8x + 4
d) 4x + x-5 = 2x - 3x + 18
e) 5(2x - 1) = 8 + 4x
f) 7x + 2(6x - 3) = -21x - 1)​

Answer 1

a)

x + 5 = 13

x = 13 - 5

x = 8

b)

x - 11 = 25

x = 25 + 11

x = 36

c)

14x - 6 = 8x + 4

14x - 8x = 4 + 6

6x = 10

x = 10/6

x = 5/3

d) Não consegui fazer, desculpe

e)

5 (2x - 1) = 8 + 4x

5 . 2x + 5 . (-1) = 8 + 4x

10x + (-5) = 8 + 4x

10x - 5 = 8 + 4x

10x - 4x = 8 + 5

6x = 13

x = 13/6

f)

7x + 2. 6x + 2 . (-3) = -21 - 1

7x + 12x - 6 = - 21 - 1

19x = - 21 - 1 + 6

19x = - 16

x = -16/19