Привет,помогите пожалуйста.
Тема: Способ сложения
1. 3x+y=-3
-5x-y=7
2. 4y-3x=11
2y+3x=1
3. 3x-7y=6
4x-7y=1
4. 2x-3y=11
3x+4y=8
5. -9x+2y=-8
5x+3y=25
6. X\3 - y+2\4=3
X+4\5+y\3=0
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