Задачи по алгебре. Рудман Р.М. - 34 стр.

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269.
2x
1
+ 5x
2
8x
3
= 8,
4x
1
+ 3x
2
9x
3
= 9,
2x
1
+ 3x
2
5x
3
= 7,
x
1
+ 8x
2
7x
3
= 12.
270.
3x
1
2x
2
+ 5x
3
+ 4x
4
= 2,
6x
1
4x
2
+ 4x
3
+ 3x
4
= 3,
9x
1
6x
2
+ 3x
3
+ 2x
4
= 4.
271.
2x
1
x
2
+ 3x
3
7x
4
= 5,
6x
1
3x
2
+ x
3
4x
4
= 7,
4x
1
2x
2
+ 14x
3
31x
4
= 18.
272.
9x
1
3x
2
+ 5x
3
+ 6x
4
= 4,
6x
1
2x
2
+ 3x
3
+ x
4
= 5,
3x
1
x
2
+ 3x
3
+ 14x
4
= 8.
273.
3x
1
+ 2x
2
+ 2x
3
+ 2x
4
= 2,
2x
1
+ 3x
2
+ 2x
3
+ 5x
4
= 3,
9x
1
+ x
2
+ 4x
3
+ 5x
4
= 1,
2x
1
+ 2x
2
+ 3x
3
+ 4x
4
= 5,
7x
1
+ x
2
+ 6x
3
x
4
= 7.
274.
x
1
+ x
2
+ 3x
3
2x
4
+ 3x
5
= 1,
2x
1
+ 2x
2
+ 4x
3
x
4
+ 3x
5
= 2,
2x
1
+ 3x
2
+ 5x
3
2x
4
+ 3x
5
= 1,
2x
1
+ 2x
2
+ 8x
3
3x
4
+ 9x
5
= 2.
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