73/10+x=15 7/10 a-7 9/13=3 4/13 10 11/15-(m+3 2/15)=6 4/15 с решением,

7 3/10+x=15 7/10
x = 15 7/10 - 7 3/10
x = 8 4/10

a-7 9/13=3 4/13 
a = 3 4/13 + 7 9/13
a = 10 13/13
a=11

10 11/15-(m+3 2/15)=6 4/15
10 11/15 - m - 3 2/15 = 6 4/15
7 9/15 - m = 6 4/15
m = 7 9/15 - 6 4/15
m = 1 5/15
m = 1 1/3

1) 7,3 + х = 15
х = 15-7,3
х = 7,7
2) 0,7а - 7 9/13 = 3 4/13
0,7а = 7 9/13 + 3 4/13
0,7а = 11
а = 11/0,7
а = 15 5/7
3) 38/5 - м = 94/15
м = 4/3
м = 1 1/3