Question

Marque a opção que traz as repostas das equações: a) 9x – 2 = 4x + 18 b) 4x – 18 + 3x = 10 c) 7x – 33 = -12 d) 4x - 8 = 6 + 2x *

a) 3 b) 2 c) 5 d)7

a) 4 b) 4 c) 3 d) 7

a) 4 b) 2 c) 4 d) 5

a) 3 b) 4 c) 3 d) 4
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Answer 1

A)

9x - 2= 4x + 18

9x - 4x= 18 + 2

5x= 20

x= 20/5

x= 4

B)

4x - 18 + 3x= 10

4x + 3x= 10 + 18

7x= 28

x= 28/7

x= 4

C)

7x - 33= - 12

7x= - 12 + 33

7x= 21

x= 21/7

x= 3

D)

4x - 8= 6 + 2x

4x - 2x= 6 + 8

2x= 14

x= 14/2

x= 7