Задачи по алгебре. Рудман Р.М. - 9 стр.

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70.
x
1
+ 2x
2
+ 5x
3
+ 9x
4
= 79,
3x
1
+ 13x
2
+ 18x
3
+ 30x
4
= 263,
2x
1
+ 4x
2
+ 11x
3
+ 16x
4
= 146,
x
1
+ 9x
2
+ 9x
3
+ 9x
4
= 92.
71.
x
1
+ x
2
+ x
3
+ x
4
+ x
5
= 15,
x
1
+ 2x
2
+ 3x
3
+ 4x
4
+ 5x
5
= 35,
x
1
+ 3x
2
+ 6x
3
+ 10x
4
+ 15x
5
= 70,
x
1
+ 4x
2
+ 10x
3
+ 20x
4
+ 35x
5
= 126,
x
1
+ 5x
2
+ 15x
3
+ 35x
4
+ 70x
5
= 210.
72.
x
1
+ 2x
2
+ 3x
3
+ 4x
4
+ 5x
5
= 2,
2x
1
+ 3x
2
+ 7x
3
+ 10x
4
+ 13x
5
= 12,
3x
1
+ 5x
2
+ 11x
3
+ 16x
4
+ 21x
5
= 17,
2x
1
− 7x
2
+ 7x
3
+ 7x
4
+ 2x
5
= 57,
x
1
+ 4x
2
+ 5x
3
+ 3x
4
+ 10x
5
= 7.
73.
2x
1
+ 7x
2
+ 3x
3
+ x
4
= 5,
x
1
+ 3x
2
+ 5x
3
− 2x
4
= 3,
x
1
+ 5x
2
− 9x
3
+ 8x
4
= 1,
5x
1
+ 18x
2
+ 4x
3
+ 5x
4
= 12.
74.
2x
1
+ 3x
2
− x
3
+ x
4
= 1,
8x
1
+ 12x
2
− 9x
3
+ 8x
4
= 3,
4x
1
+ 6x
2
+ 3x
3
− 2x
4
= 3,
2x
1
+ 3x
2
+ 9x
3
− 7x
4
= 3.
9

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