Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

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

Toán Lớp 5: ( 5/7 – y ) x14/5 = 7/10 + 1/2

Home/ Toán Lớp 5: ( 5/7 – y ) x14/5 = 7/10 + 1/2

Toán Lớp 5: ( 5/7 – y ) x14/5 = 7/10 + 1/2

Tháng Chín 26, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: ( 5/7 – y ) x14/5 = 7/10 + 1/2

Comments ( 2 )

  1. thudan
    thudan
    26 Tháng Chín, 2022 at 4:14 chiều
    Reply
    ($\dfrac{5}{7}$ – y) x $\dfrac{14}{5}$ = $\dfrac{7}{10}$ + $\dfrac{1}{2}$
    ⇔ ($\dfrac{5}{7}$ – y) x $\dfrac{14}{5}$ = $\dfrac{7}{10}$ + $\dfrac{5}{10}$
    ⇔ ($\dfrac{5}{7}$ – y) x $\dfrac{14}{5}$ = $\dfrac{12}{10}$
    ⇔ ($\dfrac{5}{7}$ – y) x $\dfrac{14}{5}$ = $\dfrac{6}{5}$
    ⇔ $\dfrac{5}{7}$ – y = $\dfrac{6}{5}$ : $\dfrac{14}{5}$
    ⇔ $\dfrac{5}{7}$ – y = $\dfrac{6}{5}$ x $\dfrac{5}{14}$
    ⇔ $\dfrac{5}{7}$ – y = $\dfrac{6}{14}$ 
    ⇔ $\dfrac{5}{7}$ – y = $\dfrac{3}{7}$ 
    ⇔ y = $\dfrac{5}{7}$ – $\dfrac{3}{7}$ 
    ⇔ y = $\dfrac{2}{7}$
                       Vậy y = $\dfrac{2}{7}$

  2. kimoanh34
    kimoanh34
    26 Tháng Chín, 2022 at 4:14 chiều
    Reply
    Giải đáp + giải thích các bước giải. Bạn học tốt.  
    ( 5/7 – y ) xx14/5 = 7/10 + 1/2 $\\$ ( 5/7 – y ) xx14/5 = 7/10 + 5/10 $\\$ ( 5/7 – y ) xx14/5 = 12/10 $\\$ 5/7 – y = 12/10 : 14/5 $\\$ 5/7 – y ) = 12/10 xx 5/14 $\\$ 5/7 – y = 3/7 $\\$y = 5/7 – 3/7 $\\$ y = 2/7 $\\$ Vậy : y = 2/7

Leave a reply

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

Mai

About Mai