Question

1) Resolva as equações abaixo:
a) 2x + 5 = 15
g) x + 9 = -4
b) 3x - 4 = 2x + 8
h) 4x - 7 = 8x - 2
c)2(x + 3) = 22
i) 4(x + 3) = 1
d) 4x - 1 = 3(x - 1)
1) 36x = 12
e) 7x - 2 + 4 = 10 + 5x k) 2x + 1 = 4x - 7
0 6x = 2x + 16
1) 9x + 9 + 3x = -7​

Answer 1

Resposta:

a) 2x + 5 = 15

2x = 15 - 5

2x = 10

x = 10/2 = 5

b) 3x - 4 = 2x + 8  

3x - 2x = 8 + 4

   x = 12

c)2(x + 3) = 22

2x + 6 = 22

2x = 22 - 6

2x = 16

x = 16/2 = 8

d) 4x - 1 = 3(x - 1)

4x - 1 = 3x - 3

4x - 3x -3 + 1

x = -2

e) 7x - 2 + 4 = 10 + 5x

7x - 5x = 10 + 2 - 4

2x = 8

x = 8/2 = 4

g) x + 9 = -4

x = -4 - 9

x = -13

h) 4x - 7 = 8x - 2

4x - 8x = -2 + 7

-4x = 5

-x = 5/4

i) 4(x + 3) = 1

4x + 12 = 1

4x = 12 - 1

4x = 11

x = 11/4

J) 36x = 12

x = 12/36 = 0,333...

k) 2x + 1 = 4x - 7

2x - 4x = -7 - 1

-2x = -6

x = -6/-2 = -3

L) 9x + 9 + 3x = -7

12x = -7 - 9

12x = -16

x = -16/12 =  -1,333...

O) 6x = 2x + 16

6x - 2x = 16

4x = 16

x = 16/4 = 4

Answer 2

Resposta:

A)2x + 5 = 15

2x = 15 - 5

2x = 10

x = 10/2

x = 5

B)3x-4=2x+8

3x-2x=8+4

1x=12

x=12

C)2x+6=22

2x=22-6

2x=16

x=16/2

x=8

D)4x-1= 3(x-1)

4x-1=3x-3

4x-3x= -3+1

x= -2

E)7x-2+4=10+5x

7x-5x=10+2-4

2x=8

x=8/2 = 4

Desculpe! Não respondi todas....