tìm x biết (2020/42 + 1966/56 + 1878/72 + 2292/90) . (x-1) = 674 11/07/2021 Bởi Aubrey tìm x biết (2020/42 + 1966/56 + 1878/72 + 2292/90) . (x-1) = 674
Đáp án: x=84 919/14 149 Giải thích các bước giải: Từ đề bài, ta có: (2 020/42+1 966/56+1 878/72+2 292/90)(x-1)=674 (1 010/21+983/28+313/12+382/15)(x-1)=674 (20 200/420+14 745/420+10 955/420+10 696/420)(x-1)=674 (34 945/420+10 955/420+10 696/420)(x-1)=674 (45 900/420+10 696/420)(x-1)=674 (14 149/105)(x-1)=674 (x-1)=674:14 149/105 (x-1)=674×105/14 149 (x-1)=70 770/14 149 x=70 770/14 149+1 x=70 770/14 149+14 149/14 149 x=84 919/14 149 Chúc bạn học tốt!!! Bình luận
(2020/42+1966/56+1878/72/2292/90).(x-1)=674 => (1010/21+983/28+313/12+382/15).(x-1)=674 =>14149.(x-1)=674 =>X=674:14149 =>X=674/14149 Bình luận
Đáp án: x=84 919/14 149
Giải thích các bước giải:
Từ đề bài, ta có:
(2 020/42+1 966/56+1 878/72+2 292/90)(x-1)=674
(1 010/21+983/28+313/12+382/15)(x-1)=674
(20 200/420+14 745/420+10 955/420+10 696/420)(x-1)=674
(34 945/420+10 955/420+10 696/420)(x-1)=674
(45 900/420+10 696/420)(x-1)=674
(14 149/105)(x-1)=674
(x-1)=674:14 149/105
(x-1)=674×105/14 149
(x-1)=70 770/14 149
x=70 770/14 149+1
x=70 770/14 149+14 149/14 149
x=84 919/14 149
Chúc bạn học tốt!!!
(2020/42+1966/56+1878/72/2292/90).(x-1)=674
=> (1010/21+983/28+313/12+382/15).(x-1)=674
=>14149.(x-1)=674
=>X=674:14149
=>X=674/14149