Решите ,пожалуйста:
Решить уравнения:
1) (2,7x- 0,9)+0,3(x-3)- 0,5(6x-9)=0,3(11-9x)+2
2) |||5x+7|- 7|+7|=10
3) |x+2|=5x (выполнить проверку)
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