Question

cuál es el valor de x de estás ecuaciones
6(2x-5)+2=20

5(x+3) +2 (x-9)=4

4(3x-5) -7 (4x+9)=13

6(x+1) -9(x-5)= 3 (4x+2)​

Answer 1

Explicación paso a paso:

1.

6 (2x - 5) + 2 = 20

12x - 30 + 2 = 20

12x - 28 = 20

12x = 48

x = 48/12

x = 4

2.

5 (x + 3) + 2 (x - 9) = 4

5x + 15 + 2x - 18 = 4

7x - 3 = 4

7x = 7

x = 1

3.

4 (3x - 5) - 7 (4x + 9) = 13

12x - 20 - 28x - 63 = 13

- 16x - 83 = 13

- 96 = 16x

- 6 = x

4.

6 (x + 1) - 9 (x - 5) = 3 (4x + 2)

6x + 6 - 9x + 45 = 12x + 6

- 3x + 51 = 12x + 6

45 = 15x

3 = x