Question

4. (x+7) - 6 < 9 . (x-2)

Answer 1

xResolver.

4(x + 7) - 6 < 9(x - 2)
4x + 28 - 6 < 9x - 18
4x + 22 < 9x - 18
22 + 18 < 9x - 4x
40 < 5x
40/5 < x
8 < x
x > 8
                                     xxxxxxxxxxxxxxxxxxxxxxxx
<-----------------------------¡----------------------------------->
                                     8

Solucion.
Intervalo
(8 , infinito)