3— : 51— = — :x1x+ — x = 15.5 2674 — :8 —= 1 — :5765 — :5 —= 1 — :4458 — :7 —= 1 — :9639 — :10— = 1 — :892xxxx 3
7× 5- 0.5x
5× 9- 2.5x
6 —1 x+ 42
17— = 3.2 — x0.1
= 3.7 = 4.5
=4.4
1 — : 6 — = 1 — : 5 5 9 4 — : 1 — = 1 — : 3 5 8 1 — : 6 — = 1 — : 5 7 8 1 — : 9 — = 1 — : 2 8 3 1 — : 3 — = 1 — : 2 4 9 x x x x x x- —1 x = 43.5 83× 8 - 4x = 1.4 8× 6 - 3.2x = 51 —1 x - 7 =7.3 217 — = 0.4 — x 0.4
4 — : 1 — = 1 — : 3 5 9 7 — : 5 — = 1 — : 8 6 7 1 — : 1 — = 1 — : 8 3 9 1 — : 7 — = 1 — : 9 8 6 3 — : 6 — = 1 — : 4 5 5 x x x x x x+ —1 x = 10.5 22× 6 - 2.5x = 1.7 7× 8 - 8x = 7.56 —1 x - 9 =9.7 520 — = 0.5 — x 0.5
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