Question

ME AJUDEM

a) 4x - 21 = 67
b) -5 + 2x = 53
c) x + 3 = 6 + 2x
d) -9x + 13 = 94
e) 2x/5 - 31 = 43​

Answer 1

Explicação passo-a-passo:

a) 4x - 21 = 67

4x = 67 + 21

4x = 88

x = 88/4

x = 22

b) - 5 + 2x = 53

2x = 53 + 5

2x = 58

x = 58/2

x = 29

c) x + 3 = 6 + 2x

x - 2x = 6 - 3

- x = 3 .(-1)

x = - 3

d) - 9x + 13 = 94

- 9x = 94 - 13

- 9x = 81 .(-1)

9x = - 81

x = - 81/9

x = - 9

e) 2x/5 - 31 = 43

2x/5 = 43 + 31

2x/5 = 74

2x = 74.5

2x = 370

x = 370/2

x = 185