Задачи по алгебре. Рудман Р.М. - 35 стр.

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275.
2x
1
− x
2
+ x
3
+ 2x
4
+ 3x
5
= 2,
6x
1
− 3x
2
+ 2x
3
+ 4x
4
+ 5x
5
= 3,
6x
1
− 3x
2
+ 4x
3
+ 8x
4
+ 13x
5
= 9,
4x
1
− 2x
2
+ x
3
+ x
4
+ 2x
5
= 1.
276.
6x
1
+ 4x
2
+ 5x
3
+ 2x
4
+ 3x
5
= 1,
3x
1
+ 2x
2
+ 4x
3
+ x
4
+ 2x
5
= 3,
3x
1
+ 2x
2
− 2x
3
+ x
4
= −7,
9x
1
+ 6x
2
+ x
3
+ 3x
4
+ 2x
5
= 2.
277.
x
1
+ 2x
2
+ 3x
3
− 2x
4
+ x
5
= 4,
3x
1
+ 6x
2
+ 5x
3
− 4x
4
+ 3x
5
= 5,
x
1
+ 2x
2
+ 7x
3
− 4x
4
+ x
5
= 11,
2x
1
+ 4x
2
+ 2x
3
− 3x
4
+ 3x
5
= 6.
278.
6x
1
+ 3x
2
+ 2x
3
+ 3x
4
+ 4x
5
= 5,
4x
1
+ 2x
2
+ x
3
+ 2x
4
+ 3x
5
= 4,
4x
1
+ 2x
2
+ 3x
3
+ 2x
4
+ x
5
= 0,
2x
1
+ x
2
+ 7x
3
+ 3x
4
+ 2x
5
= 1.
279.
8x
1
+ 6x
2
+ 5x
3
+ 2x
4
= 21,
3x
1
+ 3x
2
+ 2x
3
+ x
4
= 10,
4x
1
+ 2x
2
+ 3x
3
+ x
4
= 8,
3x
1
+ 5x
2
+ x
3
+ x
4
= 15,
7x
1
+ 4x
2
+ 5x
3
+ 2x
4
= 18.
35

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