Ответы на вопрос:
0.2*(4-х)=0.8 0.8-х=0.8 х=0.8-0.8 х=0 3(1.5+х)=9.3 4.5+х=9.3 х=9.3-4.5 3х=4.8 1х=1.6
30,60,90,120,150,180,210,240,270,300,330,360,390,420,450,480,510,540,570 19 чисел
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