Question

matematica ecuaciones​

Answer 1

Explicación paso a paso:

1)

2x - 7 = -3

2x = -3 + 7

2x = 4

x = 4/2

x = 2

2)

3x + 5 = -1

3x = - 1 -5

3x = - 6

x = -6/3

x = -2

3)

2x - 8 = 10

2x = 10 + 8

2x = 18

x = 18/2

x = 9

4)

5x - 7 + 2x = 4x + 5

5x + 2x -4x = 5 + 7

7x - 4x =  12

3x = 12

x = 12/3

x = 4

5)

5x - 2x - 4 = x + 7 - 5

5x - 2x - x = 7 - 5 + 4

5x - 3x = 7 - 1

2x = 6

x = 6/2

x = 3

6)

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

x -2x - 2 = 8 -3x -3

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

4x - 2x = 5 + 2

2x = 7

x = 7/2

7)

2 ( x - 1) - 5 = 14 - x

2x - 2 - 5 = 14 - x

2x + x = 14 + 2 + 5

3x = 21

x = 21/3

x = 7

8)

15x - 10 = 6x - 2 ( x - 1 ) + 3( 1 - x)

15x - 10 = 6x - 2x + 2 + 3 - 3x

15x - 6x + 2x + 3x = 10 + 2 + 3

15x - 6x +5x = 15

15x - x = 15

14x = 15

x = 15/14