Решите пожалуйста номер 1!!!!
a) 14.7/x=3.36/0.8
14.7/x=4.2
x=14.7/4.2
x=3.5
б) b=(4.5*3целых5/9)/12/5
b=20/3
в) 8.72/21.8=0.38/y
8.72y=21.8*0.38
8.72y=8.284
y=8.284/8.72
y= 0.95
г) 0.3/1.125=a/5.4
0.3*5.4=1.125a
1.125a=1.62
a=1.62/1.125
a=1.44
