Question

Encontre o valor da incógnita x em cada uma das
igualdades:
a) x − 6 = 10
b) 2x − 5 = 11
c) 2 ⋅ (3x + 4) = 20
d) 7x − 5 = 5x + 11
e) 2 ⋅ (3x + 1) = 10

Answer 1

a) x − 6 = 10

x = 10+6

x= 16

b) 2x − 5 = 11

2x = 11 + 5

2x = 16

x = 16/2

x = 8

c) 2 ⋅ (3x + 4) = 20

6x + 8 = 20

6x = 20 - 8

6x = 12

x = 12/6

x = 2

d) 7x − 5 = 5x + 11

7x - 5x = 11 + 5

2x = 16

x = 16/2

x = 8

e) 2 ⋅ (3x + 1) = 10

6x + 2 = 10

6x = 10 - 2

6x = 8

x = 8/6 ( simplifica )

x = 4/3