5 — :1 —= 1 — :6238 — :1 —= 1 — :7629 — :1 —= 1 — :8278 — :7 —= 1 — :7681 — :1 —= 1 — :794 xxxxxx+—1x = 15.539× 8- 0.8x = 4.2 7× 4- 5x = 7.52 —1 x- 5 =5.3420— = 0.2 — x0.8
1 — : 1 — = 1 — : 4 4 5 1 — : 1 — = 1 — : 2 8 3 3 — : 6 — = 1 — : 2 5 6 5 — : 5 — = 1 — : 6 4 9 4 — : 9 — = 1 — : 5 8 5 x x x x x x+ —1 x = 21.5 55× 6 - 4x = 6.3 4× 9 - 5x = 6.52 —1 x + 3 =3.6 311 — = 4 — x 0.2
10 — : 2 1 — = — : x 1 x- — x = 32.5 9 3 8 1 — : 5 — = 1 — : 2 4 6 10 — : 8 — = 1 — : 9 9 2 2 — : 1 — = 1 — : 3 5 4 1 — : 7 — = 1 — : 2 6 4 x x x x 2
9× 5 - 6.4x
3× 5 - 1.6x
3 —1 x - 32
3 — = 2.5 — x 0.9
= 3.3 = 5
=3.2
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