3— : 11— = — :x1x+ — x = 32.5 4845 — :4 —= 1 — :6346 — :1 —= 1 — :5995 — :8 —= 1 — :4782 — :9 —= 1 — :383xxxx 8
2× 8- 6.4x
5× 8- 0.4x
3 —1 x+ 53
4 —= 0.8 — x0.5
= 8 = 4.5
=5.1
1 — : 1 1 — = — : x 1 x- — x = 45.5 4 8 4 8 — : 1 — = 1 — : 7 7 8 1 — : 1 — = 1 — : 4 4 6 1 — : 4 — = 1 — : 7 5 3 4 — : 7 — = 1 — : 3 8 5 x x x x 2
8× 9 - 6.4x
3× 6 - 1.6x
6 —1 x - 75
3 — = 6.4 — x 0.6
= 9 = 7
=7.2
7 — : 1 — = 1 — : 8 2 8 1 — : 1 — = 1 — : 6 8 7 3 — : 1 — = 1 — : 2 6 5 1 — : 6 — = 1 — : 3 7 8 5 — : 7 — = 1 — : 6 8 2 x x x x x x- —1 x = 2.5 55× 7 - 4x = 2.3 7× 5 - 3.2x = 26 —1 x + 3 =3.1 330 — = 0.2 — x 0.8
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