Làm hộ bài này với mọi người ơi
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\(\left|1-2x\right|< 5-x\)
\(\Leftrightarrow-\left(5-x\right)< 1-2x< 5-x\)
\(\Leftrightarrow x-5< 1-2x< 5-x\)
\(\Leftrightarrow-4< x< 2\)
1. had lived /moved.
2. died /were performing.
3. was /haven't seen.
4. was cleaning /noticed.
5. finished /had been.
6. was crossing /caught.
7. was /booked.
8. hear /shouted.
9. had you read/ interrupted.
10. wanted/ had already done.
11. watched/ didn't realise.
12. tidied/ sat/ had.
13. Have you ever visited/ lived.
14. called/ saw.
15. came/ had forgotten.
\(1-\left(x-1\right):3=\dfrac{2}{3}\)
\(\Rightarrow1-\left(x-1\right)=\dfrac{2}{3}.3\)
\(\Rightarrow1-\left(x-1\right)=2\)
\(\Rightarrow x-1=1-2\)
\(\Rightarrow x-1=\left(-1\right)\)
\(\Rightarrow x=\left(-1\right)+1\)
\(\Rightarrow x=0\)
a: Các cặp điểm cùng phía với điểm I và C;K; C;B; K;B
b: Tia đối của tia CK là tia CA
c: AI=1cm
=>AC=2cm
=>CB=6cm
=>KB=3cm