Question

1)Resolva as seguintes equações: a) 4 × + 2 = 38 b) 18 × - 43 = 65 c) 23 × + 2 = 2 d) 3 + × = 0 e) 3 × = 5 = 8 f) 10 × - 19 = 21 ?​

Answer 1

Explicação :

a) 4 × + 2 = 38

4x=38-2

4x=36

x=36/4

x=9

b) 18 × - 43 = 65

18x=65+43

18x= 108

x=108/18

x=6

c) 23 × + 2 = 2

23x=2-2

23x=0

x=0

d) 3 + × = 0

x=0-3

x=-3

e) 3 × = 5 = 8

f) 10 × - 19 = 21

10x=21+19

10x=40

x=40/10

x=4