Question

28 resolva as equações: a) 4×-6=22 b)9-×=2× c)8+4×=6×-4 d)3×+1=×+9 e)4×-11=7-2× f)3×+1=5+×

Answer 1

A) 4x-6=22

4x=22+6

4x=28

x=28/4

x= 7

B)9-x=2x

9=2x+x

9=3x

3x=9

x=9/3

x= 3

C)8+4x=6x-4

8+4=6x-4x

12=2x

2x=12

x=12/2

x= 6

D)3x+1=x+9

3x-x=9-1

2x=8

x=8/2

x= 4

E)4x-11=7-2x

4x+2x=7+11

6x=18

x=18/6

x= 3

F)3x+1=5+x

3x-x=5-1

2x=4

x=4/2

x=2

Espero ter ajudado!

Answer 2

Resposta:

Explicação passo-a-passo:

a) 4x - 6 = 22

4x = 22 + 6

4x = 28

x = 28 : 4

x = 7

b) 9 - x = 2x

-x -2x = -9

-3x = -9

3x = 9

x = 9 : 3

x = 3

c) 8 + 4x = 6x - 4

4x - 6x = -8 -4

-2x = -12

x= 12 : 2

x = 6

d) 3x + 1 = x + 9

3x - x = -1 + 9

2x = 8

x = 8 : 2

x = 4

e) 4x - 11 = 7 - 2x

4x + 2x = 7 + 11

6x = 18

x = 18 : 6

x = 3

f) 3x + 1 = 5 + x

3x - x = 5 - 1

2x = 4

x = 4 : 2

x = 2