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

Toán Lớp 7: Tìm x,biết 1) $\frac{x}{12}$ – $\frac{5}{6}$ = $\frac{1}{12}$ 2) $\frac{2}{3}$ – 1$\frac{4}{15}$.x = $\frac{-3}{5}$ 3) 1$\frac{1}{2}$

Tháng Sáu 7, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: Tìm x,biết
1) $\frac{x}{12}$ – $\frac{5}{6}$ = $\frac{1}{12}$
2) $\frac{2}{3}$ – 1$\frac{4}{15}$.x = $\frac{-3}{5}$
3) 1$\frac{1}{2}$ . x – 4 = 0,5

Comments ( 2 )

  1. dantam45
    dantam45
    7 Tháng Sáu, 2022 at 11:58 chiều
    Reply
    1) x/12-5/6=1/2
    <=> x/12=1/2+5/6
    <=> x/12=4/3
    <=> x.3=12.4
    <=> x.3=48
    <=> x=16
    Vậy x=16
    2) 2/3 -14/15 .x=3/5
    <=> 2/3 -19/15 .x=3/5
    <=>19/15 .x=1/15
    <=> x=1/19
    Vậy x=1/19
    3) 11/2 .x-4=0,5
    <=> 3/2 .x -4=5/10
    <=> 3/2 .x=9/2
    <=> x=3
    Vậy x=3
     

  2. annhocbichchaubich
    annhocbichchaubich
    7 Tháng Sáu, 2022 at 11:58 chiều
    Reply
    1)
    x/12-5/6=1/12
    =>x/12=1/12+5/6
    =>x/12=11/12
    =>x=11
    vậy x=11
    2)
    2/3-1 4/5 .x=(-3)/5
    =>9/5 .x=2/3-(-3)/5
    =>9/5 .x=19/15
    =>x=19/15:9/5
    =>x=19/27
    vậy x=19/27
    3)
    1 1/2 .x-4=0,5
    =>3/2 .x=0,5+4
    =>3/2 .x=4,5
    =>x=4,5:3/2
    =>x=3
    vậy x=3 

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

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