Question

Resuelve las siguientes ecuaciones:
a) 3 + 4(x - 2) = 7
b) 5 - (x - 4) = 12
d)-3(x - 1) - 2 = 10
c) 2(x + 4) + 2 = 14​

Answer 1

Respuesta:

a ) 3

b ) - 1

c ) 2

d ) - 3

Explicación paso a paso:

a )

3 + 4 ( x - 2 ) = 7

3 + 4x - 8 = 7

4x + 3 - 8 = 7

4x - 5 = 7

4x = 7 + 5

4x = 12

x = 12 / 4

x = 3

b )

5 - ( x - 4 ) = 10

5 - x + 4 = 10

- x + 5 + 4 = 10

- x + 9 = 10

- x = 10 - 9

- x = 1

x = - 1

c )

2 ( x + 4 ) + 2 = 14

2x + 8 = 14 - 2

2x + 8 = 12

2x = 12 - 8

2x = 4

x = 4 / 2

x = 2

d )

- 3 ( x - 1 ) - 2 = 10

- 3x + 3 - 2 = 10

- 3x + 1 = 10

- 3x = 10 - 1

- 3x = 9

x = 9 / - 3

x = - 3