Question

1) Resolva as equações
a) x - 2 = 2x - 4
b) x-1= 1
c) 2x - 4/5 = 5/4
d) 3x - 9 = 0
e) 2x - 16=4​

Answer 1

1. Resolva as equações

a) x - 2 = 2x - 4

b) x - 1 = 1

c) 2x - 4/5 = 5/4

d) 3x - 9 = 0

e) 2x - 16 = 4

Resposta (Cálculos):

a) x - 2 = 2x - 4

x - 2x = -4 + 2

-x = -2 } . (-1)

x = 2

b) x - 1 = 1

x = 1 + 1

x = 2

c) 2x - 4/5 = 5/4

2x = 5/4 + 4/5

2x = 25/20 + 16/20

2x = 41/20

x = 41/20 / 2

x = 1,025

d) 3x - 9 = 0

3x = 0 + 9

3x = 9

x = 9/3

x = 3

e) 2x - 16 = 4

2x = 4 + 16

2x = 20

x = 20/2

x = 10

 Espero ter ajudado!