2x . ( x - \(\frac{1}{7}\)) = 0
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![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{-11}{12}.x+0,25=\frac{5}{6}\)
\(\frac{-11}{12}.x=\frac{5}{6}-\frac{1}{4}=\frac{7}{12}\)
\(x=\frac{7}{12}:\frac{-11}{12}=\frac{7}{12}.\frac{12}{-11}\)
\(x=\frac{7}{11}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left|3-2x\right|-3=-3\)
\(\left|3-2x\right|=\left(-3\right)+3\)
\(\left|3-2x\right|=0\)
\(\Rightarrow3-2x=0\)
\(2x=3\)
\(x=\frac{3}{2}\)
Vậy x = 3/2
=))
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có:
AOBˆ=A′OB′ˆ (đối đỉnh); 12AOBˆ=AOxˆ=BOxˆ(do Ox là tia phân giác AOBˆ)
Ta lại có:
AOxˆ=A′Ox′ˆ(đối đỉnh); BOxˆ=B′Ox′ˆ (đối đỉnh)
⇒A′Ox′ˆ=B′Ox′ˆ
⇒ Ox' là tia phân giác A′OB′ˆ (đpcm)
Chúc bạn học tốt!!!
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{\frac{3}{7}-\frac{3}{17}+\frac{3}{77}}{\frac{5}{7}-\frac{5}{17}+\frac{5}{77}}=\frac{3\left(\frac{1}{7}-\frac{1}{17}+\frac{1}{77}\right)}{5\left(\frac{1}{7}-\frac{1}{17}+\frac{1}{77}\right)}=\frac{3}{5}\)
\(\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}-\frac{1}{5}}{\frac{7}{5}-\frac{7}{4}+\frac{7}{3}-\frac{7}{2}}=\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}-\frac{1}{5}}{-7\left(-\frac{1}{5}+\frac{1}{4}-\frac{1}{3}+\frac{1}{2}\right)}=\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}-\frac{1}{5}}{-7\left(\frac{1}{2}-\frac{1}{3}+\frac{1}{4}-\frac{1}{5}\right)}=\frac{1}{-7}=-\frac{1}{7}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Answer :
1. writes
2. did
3. did (you) go
4. are singing
5. did (you) do
~Study well~
#KSJ
#Sai thì thôi nhé bn
Chia động từ:
1 sofar she ( write ) has written 50 pages of this book
2 she ( do) did her homework at 7.00 last night
3 where did you ( go ) go yesterday ?
4 they are singing ( sing ) karaoke at the moment
5 what did you do( do ) at this time yesterday ?
P/s: Sofar đi với thì HTHT chứ không phải HTĐ nhé!
<=>+) 2x=0
=>x=0
+) x-1/7=0
=>x=1/7
giải chi tiết ra bạn tam mai àk