СРОЧНО АЛГЕБРА СЕДЬМОЙ КЛАСС,ЕСЛИ ТЕКСТ НЕ ЯСЕН ЕСТЬ ФОТО!
1)
4x-3y = -10
5x+3y=t
(3x - 2y = 5,
2)
(x +2y = 7;
(5x-y=11
3)
5x+y=-t
| 4x - y =5,
4)
x + 3y = -2
|3x+2y=-2,
5)
5x - y = 14;
|3x-2y = 21
6)
3x+4y= 3;
(2x+5y = 6,
7)
4x - 7y=-56;
17x - 1 ty=23,
8)
25x +2y = -1
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