Question

Resolva:

a) 6x + 5 = 2x + 1

b) 3x + 10 - 4x = 5x+6

c) 2 (x + 1) = 3 (x + 7)

d) 3 (x + 2) - 4 (x + 1) = 8 (x + 2)

e) 4 (x + 3) = 1/2

Answer 1

Resposta:

Resolva:

a) 6x + 5 = 2x + 1

6x - 2x = 1 -5

4x= -4

x=-4/-4

x = 1

b) 3x + 10 - 4x = 5x+6

3x - 4x - 5x = 6 - 10

-6x = -4

x= -4/6

c) 2 (x + 1) = 3 (x + 7)

2x + 2 = 3x + 21

2x - 3x = 21 - 2

-1x = 19

x=19/1

x=19

d) 3 (x + 2) - 4 (x + 1) = 8 (x + 2)

3x + 6 - 4x - 1 = 8x + 16

3x - 4x -8x = 16 -6 + 1

-9x= 11

x=11/9

e) 4 (x + 3) = 1/2

4x + 12 = 1/2

4x = 1/2 - 12

4x = 1/2 - 12/1

4x = -11/1

4x = -11

x= -11/-4

Answer 2

A) 6x-2x = 1-5
4x = -4
X=-1

B) 3x -4x -5x = 6 - 10
-6x =-4 (multiplica por -1, pois x não pode ficar negativo)
6x = 4
X = 4/6
X=2/3

C) 2x +2 = 3x +21
3x - 2x = 2 - 21
X = -19

D) 3x +6 -4x - 4 = 8x + 16
8x + 4x -3x = 16-6
9x = 10
X = 10/9

E) 4x +12 = 1/2
4x = 1/2 - 12 (faz mínimo múltiplo comum)
4x = 1 -24/2
4x = -23/4
X = -23/16