`#huy`
`4:|5-2x|-2.2=-1.2`
`4:|5-2x|=-2:2=-1`
`4:|5-2x|=-1+2=1`
`|5-2x|=4:1=4`
`<=>`\(\left[ \begin{array}{l}5-2x=4\\5-2x=-4\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}2x=4+5=9\\x2=(-4)+5=1\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x=\dfrac{9}{2}\\x=\dfrac{1}{2}\end{array} \right.\)
`S={9/2;1/2}`
Đáp án+Giải thích các bước giải:
4:|5-2x|-2,2=-1,2
⇒ 4:|5-2x|=(-1,2)+2,2
⇒ 4:|5-2x|=1
⇒ |5-2x|=4
Xét 2Th:
+) Th1: 5-2x=4
⇒ 2x=5-4
⇒ 2x=1
⇒ x=1/2
+) Th2: 5-2x=-4
⇒ 2x=5-(-4)
⇒2x=9
⇒x=9/2
Vậy x=1/2;x=9/2
#Applesff
Làm giúp mình với cần gấp nha
giúp e 2 câu này với ạ giải thích cách lm cho em với
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Mọi người giúp mik với mình cần gấp xong e cho 5*
Vẽ sơ đồ tư duy của bài: Hai đường thẳng song song
Vẽ sơ đồ tư duy của bài: Hai đường thẳng vuông góc
1. always / at nine o’clock / out of the garage / in the morning / drives / his car / he _______________________________________________________________________________________ 2. a parking place / near the shops / they / find / rarely _______________________________________________________________________________________ 3. fly / with my parents / to Florida / sometimes / I / in spring _______________________________________________________________________________________ 4. late / comes / she / often / to school / in winter _______________________________________________________________________________________ 5. meet / at the sport ground / they / after dinner / always / their friends2 _______________________________________________________________________________________ 6. enjoys / swimming / in our pool / in the morning / she _______________________________________________________________________________________ 7. mother / On / the / my / always / washing / does / Mondays _______________________________________________________________________________________ 8. out / once / put / I / dustbins / week / the / a _______________________________________________________________________________________ 9. a / go / with / often / walk / dog / for / We / our _______________________________________________________________________________________ 10.sister / ironing / sometimes / My / the / does
$\frac{x-1}{2018}$ + $\frac{x-1}{2019}$ = $\frac{x-1}{2020}$ - $\frac{x-1}{2021}$
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