5— : 61— = — :x1x+ — x = 9.5 4783 — :4 —= 1 — :4591 — :1 —= 1 — :5926 — :3 —= 1 — :5445 — :3 —= 1 — :426xxxx 6
5× 8- 0.5x
4× 9- 1.6x
5 —1 x+ 84
16— = 2 — x0.7
= 1.3 = 3.5
=8.5
1 — : 7 — = 1 — : 2 8 8 1 — : 3 — = 1 — : 8 4 3 1 — : 1 — = 1 — : 9 6 6 6 — : 1 — = 1 — : 7 2 4 1 — : 1 — = 1 — : 2 8 2 x x x x x x+ —1 x = 49 82× 8 - 5x = 3 3× 8 - 3.2x = 7.54 —1 x + 3 =3.7 517 — = 3.2 — x 0.2
4 — : 1 1 — = — : x 1 x+ — x = 29 3 3 4 1 — : 9 — = 1 — : 2 8 5 2 — : 6 — = 1 — : 3 7 8 8 — : 1 — = 1 — : 7 2 5 6 — : 1 — = 1 — : 5 7 2 x x x x 4
2× 8 - 1.6x
6× 5 - 0.4x
5 —1 x + 54
27 — = 4 — x 0.1
= 5.1 = 5
=5.5
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