3 — :6 —= 1 — :2525 — :1 —= 1 — :6551 — :1 —= 1 — :2728 — :1 —= 1 — :7398 — :1 —= 1 — :789 xxxxxx-—1x = 1339× 7- 2x = 1.8 8× 8- 0.5x = 12 —1 x+ 5 =5.1220— = 3.2 — x0.7
4 — : 3 — = 1 — : 5 4 9 1 — : 4 — = 1 — : 8 3 3 1 — : 8 — = 1 — : 8 7 5 1 — : 6 — = 1 — : 2 7 8 5 — : 9 — = 1 — : 6 8 3 x x x x x x- —1 x = 20 87× 5 - 2x = 5.6 5× 6 - 2x = 2.52 —1 x - 3 =3.5 329 — = 1.6 — x 0.5
8 — : 6 — = 1 — : 9 7 3 3 — : 1 — = 1 — : 4 7 9 1 — : 1 — = 1 — : 2 2 4 1 — : 6 — = 1 — : 3 5 2 1 — : 1 — = 1 — : 9 6 3 x x x x x x+ —1 x = 41.5 36× 8 - 1.6x = 7.5 4× 7 - 4x = 6.55 —1 x + 8 =8.9 428 — = 0.2 — x 0.4
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