Question

EXERCICIOS DE FIXAÇÃO
1) Resolva as equações abaixo
2)
a) 3x + 10 = 16
b) 6x - 7 = 11
3x – 3 = 18
d) 6x - 8 = 5x + 2
e) x + 20 = 15
f) 6x - 6 = 10 + 2x
g) 2x - 12 = -20
h) 7x - 9 = 4x - 6​

Answer 1

a) 3x + 10 = 16

3x = 16 - 10

3x = 6

x = 6 ÷ 3

x = 2

b) 6x - 7 = 11

6x = 11 + 7

6x = 18

x = 18 ÷ 6

x = 3

c) 3x – 3 = 18

3x = 18 + 3

3x = 21

x = 21 ÷ 3

x = 7

d) 6x - 8 = 5x + 2

6x - 5x = 2 + 8

x = 10

e) x + 20 = 15

x = 15 - 20

x = - 5

f) 6x - 6 = 10 + 2x

6x - 2x = 10 - 6

4x = 4

x = 4 ÷ 4

x = 1

g) 2x - 12 = -20

2x = -20 + 12

2x = - 8

x = - 8 ÷ 2

x = - 4

h) 7x - 9 = 4x - 6

7x - 4x = - 6 + 9

3x = 3

x = 3 ÷ 3

x = 1