СРОЧНО!!!ДАЮ 25Б!!!ЗАРАНЕЕ СПАСИБО!!!
Решите системы неравенства и сделайте числовой промежуток:
1. {3-4х>5 и {6+9x<=1
2. {3x-6>2x и {2x-6>5x
3. {2x+1<=13 и {9-2x
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