Question

a) 2x + 60 = 138 b) 4x + 2x – 6 = 36 c) 2 – 5x – x = 3 d) 4x – 30 = x e) 3x – 5 = x + 7 f) 7 (y + 2) = 2y – 6 g) 5y – 6 = 2y + 3 h) 5c – 6 = 2 (c + 9)

Answer 1

Resposta:

a) 2x + 60 = 138

2x= 138 - 60

2x = 78

x = 78/ 2

x = 39

b) 4x + 2x - 6 = 36

4x + 2x = 36 + 6

6x = 42

x = 42/ 6

x= 7

c) 2 – 5x – x = 3

-5x - x = 3 -2

-6 x= 1

x = -1/6

d) 4x – 30 = x

4x - x = + 30

3x = 30

x= 30/3

x = 10

e) 3x – 5 = x + 7

3x - x = + 7 + 5

2x = 12

x= 12/ 2

x = 6

f) 7 (y + 2) = 2y – 6

7y + 14 = 2y - 6

7y - 2y = - 6 - 14

5y = -20

y= 20/ 5

y = 4

g) 5y – 6 = 2y + 3

5y - 2y = +3 +6

3x = 9

x = 9/3

x= 3

h) 5c – 6 = 2 (c + 9)

5c - 6 = 2c + 18

5c - 2c = 18 + 6

3c = 24

c= 24/ 3

c = 8

Explicação passo-a-passo:

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