Question

COLOQUEM OS CÁLCULOS PORFAVOR

a) 2 ( x - 4 ) = x + 8

b) 3x + 4. ( 1 + x ) + 2 = 5x - x - 6

c) 5. ( 3x - 2 ) = 2. ( 6x + 3 )

d) 7. ( x - 1 ) = 2. ( 3x + 1

e) 2. ( x - 2 ) + 5. ( 2 - x ) + 6. ( x + 1 ) = 0

f) x - ( x + 1 ) = 12 - ( 3x - 2 )

g) 3. ( x + 3 ) - 5 = 22

h) 3 ( x + 2 ) = 2 ( x - 7 )

i) 4 ( 2m - 1 ) + 3m = 2 ( 4m - 1 ) - ( 2 - m )

j) 3 ( x + 2 ) - 1 = 2 ( x + 3 ) - 7

k) 3 ( 2x - 3 ) + x = 5

l) 2 ( x - 1 ) + 3 ( x + 1 ) = 4 ( x + 2)

m) 5 ( 2x - 1 ) = 3 ( x + 10 )​

Answer 1

Resposta:

Explicação passo-a-passo:

a) 2(x-4) = x+8

2x-8 = x+8

2x - x= 8+8

x = 16

b) 3x+4(1+x)+2=5x-x-6

3x + 4 + 4x + 2 = 4x - 6

3x + 4x - 4x = -6 -4 -2

3x = -12

x = -4

c) 5 (3x - 2) = 2 (6x + 3)

15x - 10 = 12x + 6

15x - 12x = 16

3x = 16

x= 16/3

d) 7 ( x - 1 ) = 2 ( 3x + 1 )

7x - 7 = 6x + 2

7x - 6x = 2+7

x = 9

e) 2 ( x - 2 ) + 5 ( 2 - x ) + 6 ( x + 1 ) = 0

2x - 4 + 10 - 5x + 6x + 6 = 0

3x + 12 = 0

3x = - 12

x = - 4

f) x - ( x + 1 ) = 12 - ( 3x - 2 )

x - x - 1 = 12 -3x + 2

- 2x + 3x = 15

x = 15

g) 3 ( x + 3 ) - 5 = 22

3x + 9 -5 = 22

3x + 4 = 22

3x = 18

x = 6

h) 3 ( x + 2 ) = 2 ( x - 7 )

3x + 6 = 2x - 14

3x - 2x = - 14 - 6

x = - 20

i) 4 ( 2m - 1 ) + 3m = 2 ( 4m - 1 ) - ( 2 - m )

8m - 4 + 3m = 8m - 2 - 2 + m

8m - 8m + 3m - m = -4 + 4

2m = 0

m = 0

j) 3 ( x + 2 ) - 1 = 2 ( x + 3 ) - 7

3x + 6 - 1 = 2x + 6 - 7

3x - 2x = -1 - 6 + 1

x = -6

k) 3 ( 2x - 3 ) + x = 5

6x - 9 + x = 5

7x = 14

x= 2

l) 2 ( x - 1 ) + 3 ( x + 1 ) = 4 ( x + 2 )

2x - 2 + 3x + 3 = 4x + 8

5x - 4x = 8 -3 + 2

x = 7

m) 5 ( 2x - 1 ) = 3 ( x + 10 )

10x - 5 = 3x + 30

10x - 3x = 30 + 5

7x = 35

x = 5