1 — :8 —= 1 — :3931 — :1 —= 1 — :9776 — :7 —= 1 — :7661 — :1 —= 1 — :2845 — :1 —= 1 — :689 xxxxxx-—1x = 4654× 9- 0.8x = 8.6 9× 8- 2x = 4.51 —1 x- 8 =8.5223— = 6.4 — x0.2
8 — : 6 — = 1 — : 9 5 9 1 — : 8 — = 1 — : 8 7 8 1 — : 3 — = 1 — : 2 4 7 1 — : 6 — = 1 — : 6 5 5 5 — : 1 — = 1 — : 4 8 8 x x x x x x- —1 x = 39.5 52× 5 - 2x = 1.6 4× 6 - 8x = 22 —1 x - 6 =6.8 528 — = 2.5 — x 0.6
6 — : 1 1 — = — : x 1 x+ — x = 48.5 5 7 5 1 — : 4 — = 1 — : 9 3 9 7 — : 1 — = 1 — : 8 2 9 6 — : 4 — = 1 — : 5 3 9 2 — : 1 — = 1 — : 3 2 2 x x x x 6
7× 7 - 6.4x
5× 8 - 0.5x
5 —1 x + 22
8 — = 1.6 — x 0.4
= 2.4 = 6.5
=2.1
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