Question

a) 4x + 1 - 30

b) 2x -8 = 8

c) 5x - 1 = 19

d) 7y - 4 = 10

e) 7x - 3 + 5x =9

f) 16 - x = x + 15​

Answer 1

Resposta:

4x = -1 -30

4x = -31

x= 31÷4 dara número quebrado

x = 7.75

2x - 8 = 8

2x = 8 + 8

2x = 16

x = 16÷2

x = 8

7y - 4 = 10

7y = 4 + 10

7y = 14

y = 14÷7

y = 2

7x - 3 + 5x = 9

7x + 5x = 3 + 9

12x = 12

x = 12÷12

x = 1

16 - x = x + 15

-x - x = -16 + 15

-2x = -1 × (-1)

2x = 1

x = 2÷1

x = 2

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