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

Toán Lớp 6: X + 3/4 = 3/5 + -4/3 X + 7/2 = -2/3 – 3/5 5/8 – X = -3/10 X – 2/7 = 7/21 -X – 3/4 = -8/13 11/12 – ( 2/5 + X ) = 2/3 Giúp với ạ

Tháng Hai 20, 2023 Toán học 2 Comments 0 views

Toán Lớp 6: X + 3/4 = 3/5 + -4/3
X + 7/2 = -2/3 – 3/5
5/8 – X = -3/10
X – 2/7 = 7/21
-X – 3/4 = -8/13
11/12 – ( 2/5 + X ) = 2/3
Giúp với ạ

Comments ( 2 )

  1. giahan44
    giahan44
    20 Tháng Hai, 2023 at 4:29 chiều
    Reply
    x + 3/4 = 3/5 + \frac{-4}{3}
    x  + 3/4 = -11/15
    x             = -11/15 – 3/4
    x             = -89/60
    ——————————————-
    x + 7/2 = -2/3 – 3/5
    x + 7/2 =-19/15
    x        = -19/15 – 7/2
    x         =-143/30
    —————————————————-
    5/8 – x = -3/10
          x     = 5/8 – \frac{-3}{10}
          x         =37/40
    ——————————————————–
    x – 2/7 = 7/21
    x         = 7/21 + 2/7
    x          = 7/21 + 6/21
    x         = 13/21
    ———————————————————
    -x – 3/4 = -8/13
    -3/4 + 8/13 = x
    -7/52           = x
    Vậy x = -7/52
    ———————————————————
    11/12 – ( 2/5 + x) = 2/3
                 (2/5 + x) = 11/12 – 2/3
                  (2/5 + x) = 11/12 – 8/12
                  2/5 + x = 1/4
                               x = 1/4 – 2/5
                              x =-3/20

  2. dananhnhu2k4
    dananhnhu2k4
    20 Tháng Hai, 2023 at 4:28 chiều
    Reply
      x+$\frac{3}{4}$ =$\frac{3}{5}$ +$\frac{-4}{3}$
    ⇒ x+$\frac{3}{4}$ =-$\frac{11}{15}$
    ⇒x=-$\frac{11}{15}$-$\frac{3}{4}$
    ⇒x=-$\frac{89}{60}$
     x+$\frac{7}{2}$=-$\frac{2}{3}$-$\frac{3}{5}$
    ⇒ x+$\frac{7}{2}$=$\frac{-19}{15}$
    ⇒x=$\frac{-19}{15}$-$\frac{7}{2}$
    ⇒x=-$\frac{143}{30}$
     $\frac{5}{8}$-x=-$\frac{3}{10}$
    ⇒x= $\frac{5}{8}$–$\frac{3}{10}$
    ⇒x=$\frac{37}{40}$
     x-$\frac{2}{7}$=$\frac{7}{21}$
    ⇒x=$\frac{7}{21}$+$\frac{2}{7}$
    ⇒x=$\frac{13}{21}$
     -x -$\frac{3}{4}$=-$\frac{8}{13}$
    ⇒-x=-$\frac{8}{13}$+$\frac{3}{4}$
    ⇒-x=$\frac{7}{52}$
     $\frac{11}{12}$-($\frac{2}{5}$+x)=$\frac{2}{3}$
    ⇒($\frac{2}{5}$+x)=$\frac{11}{12}$-$\frac{2}{3}$
    ⇒$\frac{2}{5}$+x=$\frac{1}{4}$
    ⇒x=$\frac{1}{4}$-$\frac{2}{5}$
    ⇒x=-$\frac{3}{20}$

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

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