Question

N
8) Calcule o valor de x de modo que:
a) 2x + 3 = 15
d) 4x + 2 = -18
6) 7x-1=13
e) 5x – 2 = 7 + 6
C) 2x - 4 = 3
f) 10x + 1 = -4 - 5
9) Resolva as equações.​

Answer 1

Explicação passo-a-passo:

8-

A)

2x + 3 = 15

2x = 15 - 3

2x = 12

x = 12 ÷ 2

x = 6

D)

4x + 2 = -18

4x = - 18 - 2

4x = -20

x = -20 ÷ 4

x = -5

6-

A)

7x - 1 = 13

7x = 13 + 1

7x = 14

x = 14 ÷ 7

x = 2

E)

5x - 2 = 7 + 6

5x - 2 = 13

5x = 13 + 2

5x = 15

x = 15 ÷ 5

x = 3

C)

2x - 4 = 3

2x = 3 + 4

2x = 7

x = 7/2

F)

10x + 1 = - 4 - 5

10x + 1 = - 9

10x = - 9 - 1

10x = - 10

x = 10 ÷ ( - 10)

x = - 1