7— : 11— = — :x1x- — x = 11 6975 — :6 —= 1 — :4741 — :4 —= 1 — :6541 — :6 —= 1 — :5521 — :3 —= 1 — :927xxxx 6
7× 7- 0.5x
8× 6- 6.4x
4 —1 x- 84
5 —= 1.6 — x0.8
= 0.6 = 6.5
=8.7
2 — : 1 1 — = — : x 1 x+ — x = 33 3 8 2 8 — : 1 — = 1 — : 7 4 7 6 — : 9 — = 1 — : 5 8 5 9 — : 10 — = 1 — : 8 9 9 5 — : 2 — = 1 — : 4 3 7 x x x x 7
3× 5 - 0.4x
4× 7 - 0.4x
5 —1 x + 24
6 — = 0.8 — x 0.2
= 9.5 = 6.5
=2.3
7 — : 9 — = 1 — : 6 8 6 7 — : 5 — = 1 — : 8 4 3 1 — : 3 — = 1 — : 3 4 6 1 — : 4 — = 1 — : 3 3 7 1 — : 1 — = 1 — : 5 2 5 x x x x x x- —1 x = 25.5 89× 6 - 8x = 3.6 5× 4 - 6.4x = 42 —1 x - 7 =7.9 51 — = 2.5 — x 0.5
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