Question

Решите неравенство:|10x+1|>21; |2-6x|≤4

Answer 1

1)x<-1/10,-10x-1>21,-10x>22,x<-2,2
x≥-1/10,10x+1>21,10x>20,x>2
x∈(-≈;-2,2) U (2;≈)
2)x<1/3,2-6x≤4,-6x≤2,x≥-1/3  x∈[-1/3;1/3)
x≥1/3,-2+6x≤4,6x≤6,x≤1  x∈[1/3;1]
Ответ: х∈[-1/3;1]