Toán Lớp 7: 3/2|2+x|=5/4
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Toán Lớp 7: 3/2|2+x|=5/4
các bạn ơi giúp mình với ạ
Comments ( 2 )
3/2|2 + x| = 5/4
=> |2 + x| = 5/4 : 3/2
=> |2 + x| = 5/4. 2/3
=> |2 + x| = 5/6
=> \(\left[ \begin{array}{l}2+x=\dfrac{5}{6}\\2+x=\dfrac{-5}{6}\end{array} \right.\)
=> \(\left[ \begin{array}{l}x=\dfrac{5}{6}-2\\x=\dfrac{-5}{6}-2\end{array} \right.\)
=> \(\left[ \begin{array}{l}x=\dfrac{-7}{6}\\x=\dfrac{-17}{6}\end{array} \right.\)
Vậy x in {-7/6; -17/6}
#Mỏn
3/2|2+x|=5/4
|2+x|=5/4:3/2
|2+x|=5/6 hoặc |2+x|=-5/6
x=5/6-2 hoặc x=-5/6-2
x=5/6-12/6 hoặc x=-5/6-12/6
x=-7/6 hoặc x=7/6
vậy x=-7/6 hoặc x=7/6