Question

10- Resolva as equações:

a) 4 x – 1 = 2x + 9 c) 3x – 4 = 5x+ 6

b) 5x +3 = 4x – 5 d)2 x – 3 = 3 x – 1​

Answer 1

Resposta:

a) 4x-4=2x+9

4x-2x= 9+1

2x= 10

x= 10/2

x= 5

b) 5x+3= 4x -5

5x -4x= -5-3

X= -8

c) 3x-4= 5x+6

3x- 5x= 6+4

2x= 10

x= 10/2

x= 5

d) 2x-3= 3x-1

2x-3x= -1 +3

x= 2

Answer 2

Resposta:

a)4x - 1 = 2x + 9

4x - 2x = 9 + 1

2x = 10

x = 10÷2

x = 5

b) 5x + 3 = 4x - 5

5x - 4x = -5 - 3

x = - 2

c) 3x - 4 = 5x + 6

3x - 5x = 6 + 4

- 2x = 10(×1)

2x = 10

x = 10÷2

x = 5

d) 2x - 3 = 3x - 1

2x - 3x = -1 + 3

- x = 2(×1)

x = 2