3(2-x)<-2/3(6x-21)
3(2-x)<-2/3(6x-21)
3(2-x) ≤ -2/3(6x-21) /*3 18 - 9x ≤ -12x + 42 -9x + 12x ≤ 42 - 18 3x ≤ 24 / : 3 x ≤ 8
3(2-x)<-2/3(6x-21) 6-3x<-4x+14 -3x+4x<14-6 x<8
3(2-x)≤-2/3(6x-21)/*3 18-9x≤-12+42 -9x+12x≤42-18 3x≤24/:3 x≤8 Mam nadzieję ,że pomogłam ;)