21/b=0,7/ 0,8 7: 10 = 140 : n 0,7/0,9=14/a 5,1/y=1,7/0,5 - вопрос №688070021070871014007091451170537213 от lelchist 04.07.2021 01:11

Question

Математика: 21/b=0,7/ 0,8 7: 10 = 140 : n 0,7/0,9=14/a 5,1/y=1,7/0,5 3: 7= 21 : y x/3,5 =0,4/ 0,5 0,3/1,4 = x/28 28: m = 4 : 7

lelchist · Answer

21/b=0.7/0.8b=21*0.8/0.7=247:10=140:nn=140*10:7=2000.7/0.9=14/aa=14*0.9/0.7=185.1/y=1.7/0.5y=5.1*0.5/1.7=1.53:7=21:yy=21*7:3=49x/3.5=0.4/0.5x=3.5*0.4/0.5=2.80.3/1.4=x/28x=0.3*28/1.4=628:m=4:7m=28*7:4=49...