Question

buenos días alguien que me ayude con estos 9 ejercicios muchas gracias es de propiedad de igualdad ​

Answer 1

1. x + 12 = 36

x = 36 - 12

x = 24

2. x - 25 = 48

x = 48 + 25

x = 73

3. 3x = 42

x = 42 / 3

x = 14

4. 2x/3 = 8

2x = 8.3

2x = 24

x = 24/2

x = 12

5. (5x + 1)/4 = 4x / 3

( 5x + 1) . 3 = 4x . 4

15x + 3 = 16x

3 = 16x - 15 x

x = 3

6. 2x + 3 = 18

2x = 18 - 3

2x = 15

x = 15 / 2

7. 14 - x = 9

- x = 9 - 14

-x = - 5 ... (-1)

x = 5

8. (3x - 12)/4 = x / 5 + 4

(3x - 12)/4 = (x + 20) / 5

(3x - 12). 5 = (x + 20) . 4

15x - 60 = 4x + 80

15x - 4x = 80 + 60

11x = 140

x = 140 / 11

9. 5x - 10 = 30

5x = 30 + 10

x = 40/5

x = 8