1488. Решите системы уравнений способом сложения:
1)
2)
x + 9
y +8
= 3,
х+7 у – 8
= 3,
3 5
x +5
y +9
+
= 5;
4 3
3
6
х+11
+
7
2
у+6
= 4; помогите пожалуйста ​
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