Question

a) x +6=9
b) x-5 = 7
c) x +12 =20
d) 2x + 4 = 8
e)5x-10 = 20
f) x +4 = -10
g) 9+x = 2
h) 3x - 9 = 9
i) 4x +4 =12
j) x +16 = 25​

Answer 1

Resposta:

a) x = 3

b) x = 12

c) x = 8

d) x = 2

e) x = 6

f) x = -14

g) x = -7

h) x = 6

i) x = 2

j) x = 9

Explicação passo-a-passo:

a) x + 6 = 9

x = 9 - 6

x = 3

b) x - 5 = 7

x = 7 + 5

x = 12

c) x + 12 = 20

x = 20 - 12

x = 8

d) 2x + 4 = 8

2x = 8 - 4

2x = 4

x = 4/2

x = 2

e) 5x - 10 = 20

5x = 20 + 10

5x = 30

x = 30/5

x = 6

f) x + 4 = -10

x = -10 - 4

x = -14

g) 9 + x = 2

x = 2 - 9

x = -7

h) 3x - 9 = 9

3x = 9 + 9

3x = 18

x = 18/3

x = 6

i) 4x + 4 = 12

4x = 12 - 4

4x = 8

x = 8/4

x = 2

j) x + 16 = 25

x = 25 - 16

x = 9