6 класс (0.9X+4.55)*0.3=1.5

(0.9x + 4.55) * 0.3 = 1.50.27x +1.365 = 1.50.27x = 1.5 - 1.3650.27x = 0.135x = 0.135 : 0.27х = 0.5

(0,9х+4,55)*0,3=1,50,9х+4,55=1,5:0,30,9х+4,55=50,9х=5-4,550,9х=0,45х=0,45:0,9х=0,5