Question

resuelve las siguientes ecuaciones:

1. X - 7 = -8
2. 3X = 42
3. -3X - 4 = 20
4. 15X = -27 + 6X
5. 3 + 2 ( X - 2 ) = -5
6. 0.2X - 0.15 = 0.15X
7. ¼X - 6 = ⅓X
ayudaaaaa, por favor!!! es para hoy:(​

Answer 1

Explicación paso a paso:

1. x - 7 = -8

x = -1

2. 3x = 42

x = 14

3. -3x -4 = 20

-3x = 24

x = -8

4. 15x = -27 + 6x

9x = -27

x = -3

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

2 (x - 2) = -8

2x - 4 = -8

2x = -4

x = -2

6. 0.2x - 0.15 = 0.15x

2/10x - 15/100 = 15/100x

2/10x - 15/100x = 15/100

20/100x - 15/100x = 15/100

5/100x = 15/100

1/20x = 3/20

x = 3

7. 1/4x - 6 = 1/3x

1/4x - 1/3x = 6

-1/12x = 6

x = -72