5 — :1 —= 1 — :6554 — :1 —= 1 — :3385 — :5 —= 1 — :4691 — :10— = 1 — :3971 — :5 —= 1 — :363 xxxxxx-—1x = 47.556× 9- 4x = 6.7 3× 6- 1.6x = 25 —1 x+ 4 =4.938 —= 2 — x0.8
4 — : 1 — = 1 — : 5 8 7 1 — : 1 — = 1 — : 2 9 3 1 — : 7 — = 1 — : 3 8 6 9 — : 1 — = 1 — : 8 2 7 7 — : 5 — = 1 — : 8 6 7 x x x x x x+ —1 x = 42.5 75× 5 - 2x = 3.8 7× 7 - 0.8x = 32 —1 x + 3 =3.5 417 — = 0.5 — x 0.3
5 — : 4 1 — = — : x 1 x- — x = 23 6 3 8 7 — : 1 — = 1 — : 8 3 2 2 — : 4 — = 1 — : 3 5 2 1 — : 1 — = 1 — : 7 9 4 5 — : 1 — = 1 — : 4 2 5 x x x x 7
2× 6 - 3.2x
8× 7 - 0.8x
6 —1 x + 63
18 — = 2.5 — x 0.8
= 4.1 = 3
=6.1
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