Respuesta :
Explicación paso a paso:
(2)
2x - 3 = 6 + x
2x - x = 6 + 3
x = 9
(3)
2(2x - 3) = 6 + x
4x - 6 = 6 + x
4x - x = 6 + 6
3x = 12
x = 12/3
x = 4
(4)
4x + 6x = 20
10x = 20
x = 20/10
x = 2
(5)
2x - 4x = 30
-2x = 30 //(-1)
2x = -30
x= -30/2
x = -15
(espero te sirva ;;)
2x - 3 = 6 + x
2x - x = 6 + 3
x = 9
2(2x - 3) = 6 + x
4x - 6 = 6 + x
4x - x = 6 + 6
3x = 12
x = 12/3
x = 4
4x + 6x = 20
10x = 20
x = 20/10
x = 2
2x - 4x = 30
-2x = 30 //(-1)
2x = -30
x= -30/2
x = -15
XDD