1.2.3.4.5.6.7.8.9 how to make it equal to 15 for mixed addition, number addition and oblique addition

1.2.3.4.5.6.7.8.9 how to make it equal to 15 for mixed addition, number addition and oblique addition

2 9 4
7 5 3
6 1 8
First put five in the middle
And then the remaining eight numbers
9+1=8+2=7+3=6+4
Just line up

Simple calculation of 15 / 8-9 / 1 + 15 / 7

15 / 8-9 / 1 + 15 / wrong title
It should be 8 / 15-1 / 9 + 7 / 15
=8/15+7/15-1/9
=1-1/9
=8/9

Simple calculation: 8 / 15 - (7 / 8-7 / 15) and 4 / 9 - (4 / 9-1 / 10)

8/15-(7/8-7/15)=8/15-7/8+7/15=8/15+7/15-7/8=1-7/8=1/8
4/9-(4/9-1/10)=4/9-4/9+1/10=0+1/10=1/10