Question

3.(6+x) = 2.(x-5)
9.(x+1) = 6.(x+3)
x-7 = 2.(x-3)
12-(x-3) = 6
si puede ser verificado la ecuacion
y el desarrollo

Answer 1

1. 3 (6 + x) = 2 (x - 5)

18 + 3x = 2x - 10

3x - 2x = - 10 - 18

-x = - 10 - 18

x = - 28

Verificación:

3 (6 + (-28)) = 2 (-28 - 5)

3 (6 - 28) = 2 (-28 - 5)

3 (-22) = 2 (-33)

-66 = -66

2. 9 (x + 1) = 6 (x + 3)

9x + 9 = 6x + 18

9x - 6x = 18 - 9

3x = 9

x = 3

Verificación:

9 (3 + 1) = 6(3 + 3)

9 (4) = 6 (6)

36 = 36

3. x - 7 = 2 (x - 3)

x - 7 = 2x - 6

x - 2x = - 6 + 7

-x = - 6 + 7

-x = 1

x = - 1

Verificación:

(-1) - 7 = 2 (-1 - 3)

-1 - 7 = 2 (-4)

-8 = -8

4. 12 - (x - 3) = 6

12 - x + 3 = 6

15 - x = 6

x = 6 - 15

x = -9

x = 9

Verificación:

12 - (9 - 3) = 6

12 - 6 = 6

6 = 6