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2/3 * 3 2/3 = 2/3 * 11/3 = 22/9 = 2 4/9
1) 75-10=65
2) 65:3=13-1автобус
3) 13•2=26-2автобус
4) 26+10=36 -в 3 автобусах
А).х=(2,4•0,9)/7,2=0,3
б).х•18/7=2/3•9/7
18х/7=6/7
х=(6•7)/(18•7)=1/3