Respuesta :
Hi,
-6x + 14 < -28
-6x + 14 - 14 < -28 - 14
-6x < -42
-6x/-6 > -42/-6
x > 7
S = [ +infinity ; 7 ]
3x + 28 < 25
3x + 28 - 28 < 25 - 28
3x < -3
3x/3 < -3/3
x < -1
S = ] -infinity ; -1 [
Hi,
-6x + 14 < -28
-6x + 14 - 14 < -28 - 14
-6x < -42
-6x/-6 > -42/-6
x > 7
S = [ +infinity ; 7 ]
3x + 28 < 25
3x + 28 - 28 < 25 - 28
3x < -3
3x/3 < -3/3
x < -1
S = ] -infinity ; -1 [