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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: I1/2.x+2/3I=I3/4.x+5/6I giúp tôi

Tháng Một 19, 2023 Toán học 2 Comments 0 views

Toán Lớp 7: I1/2.x+2/3I=I3/4.x+5/6I giúp tôi

Comments ( 2 )

  1. phuongthaongoc
    phuongthaongoc
    19 Tháng Một, 2023 at 4:42 sáng
    Reply
    |1/2x+2/3|=|3/4x+5/6|
    <=>\(\left[ \begin{array}{l}\dfrac{1}{2}x+\dfrac{2}{3}=\dfrac{3}{4}x+\dfrac{5}{6}\\\dfrac{1}{2}x+\dfrac{2}{3}=-(\dfrac{3}{4}x+\dfrac{5}{6})\end{array} \right.\) 
    <=>\(\left[ \begin{array}{l}x=-\dfrac{2}{3}\\x=-\dfrac{6}{5}\end{array} \right.\) 
    Vậy x=-2/3,x=-6/5

  2. lanthuhoa
    lanthuhoa
    19 Tháng Một, 2023 at 4:42 sáng
    Reply
    |\frac{1}{2}x + \frac{2}{3}| = | \frac{3}{4}x + \frac{5}{6}|
    ⇒ \(\left[ \begin{array}{l}\frac{1}{2}x + \frac{2}{3}=\frac{3}{4}x + \frac{5}{6}\\\frac{1}{2}x + \frac{2}{3}=-(\frac{3}{4}x + \frac{5}{6})\end{array} \right.\) 
    ⇒\(\left[ \begin{array}{l}\frac{5}{4}x + \frac{2}{3}= \frac{5}{6}\\\frac{-1}{4}x + \frac{2}{3} =\frac{-5}{6} \end{array} \right.\) 
    ⇒\(\left[ \begin{array}{l}\frac{5}{4}x =\frac{1}{6}x \\\frac{-1}{4}x=\frac{-9}{6}x \end{array} \right.\)
    ⇒\(\left[ \begin{array}{l}x=\frac{2}{15}\\x=-4\end{array} \right.\)
                                      XIN HAY NHẤT
     

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222-9+11+12:2*14+14 = ? ( )

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