Contoh soal pertidaksamaan linear 2 variabel dan penyelesaiannya

x/3-3 > 2/3(x+3)
= x/3-3 > 2(x+3)/3
= x-9 > 2(x+3)
= x-9 > 2x+6
= -9-6 > 2x-x
= -15 > x
= x < -15

|3x+2| <= 5
= -5 <= 3x+2 <= 5
= -5-2 <= 3x <= 5-2
= -7 <= 3x <= 3
= -7/3 <= x <= 3/3
= -7/3 <= x <= 1