Proportions Part I #4
a =
a
8
=
2
1
c =
5
c
=
10
8
a =
15
a
=
1
5
b =
4
5
=
8
b
d =
d
2
=
1
6
d =
4
d
=
12
9
c =
10
12
=
6
c
d =
d
14
=
3
7
c =
5
2
=
4
c
d =
10
d
=
5
2
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