Question

las ecuaciones por favor no entiendo los - + en las ecuaciones

Answer 1

1) 2x + 7 = -3

2x = -3 -7

2x = -10

x = -10 ÷ 2

x = -5

2) 5x + -7 = x - -9

5x -x = -9 - 7

4x = -16

x = -16 ÷ 4

x = 4

3) -9 + 6x = 15 + 2x

6x - 2x = 15 + 9

4x = 24

x = 24/4

x = 6

4) 5x - 1 = 9

5x = 9 + 1

5x = 10

x = 2

5) 4x - 2 = 8 + 3x

4x - 3x = 8 + 2

x = 10

6)  -6 + 2x - 5 = 5x + 10 -3

-6 -5 -10 + 3 = 5x - 2

-18 = 3x

-6 = x

7) 8+ 12x = 15x - 19

15x + 12x = 19 + 8

3x = 27

x = 27 ÷ 3

x = 9