Toán Lớp 7: `-5/7(3/5-x+1 3/2)=|4/35-19/70|`

Question

Toán Lớp 7:  -5/7(3/5-x+1 3/2)=|4/35-19/70|

hauthanhyen98 · Answer

-5/7(3/5-x+1 3/2)=|4/35-19/70|   &rArr; -5/7(3/5 - x + (1 &times; 2 + 3)/2) = |4/35-19/70|   &rArr; -5/7(3/5 - x + 5/2) = |4/35-19/70|   &rArr; -5/7(31/10 - x) = |4/35-19/70|   &rArr; -5/7(31/10 - x) = |-11/70|   &rArr; -5/7(31/10 - x) =11/70   &rArr; -(5(31/10 - x))/7 = 11/70   &rArr; -5(31/10 - x) = 11/70 &times; 7   &rArr; -5(31/10 - x) = 77/70   &rArr; -5(31/10 - x) = 11/10   &rArr; 31/10 - x = -(11/10)/5   &rArr; 31/10 - x = -11/50   &rArr; -x = -11/50 - 31/10   &rArr; -x = -83/25   &rarr; x = 83/25   Vậy x = 83/25.     Cho m&igrave;nh xin hay nhất nha bạn       @Drew McIntyre

maitrucloan · Answer

-5/(7).(3/5-x+1(3)/(2))=|4/(35)-(19)/(70)|   &hArr;-5/(7).(3/5-x+5/2)=|4/(35)-(19)/(70)|   &hArr;-5/(7).(6/(10)-x+(25)/(10))=|(8)/(35)-(19)/(70)|   &hArr;-5/(7).((31)/(10)-x)=|-(11)/(70)|   &hArr;-5/(7).((31)/(10)-x)=-(-(11)/(70))   &hArr;-5/(7).((31)/(10)-x)=(11)/(70)   &hArr;(31)/(10)-x=(11)/(70):(-5/7)   &hArr;(31)/(10)-x=(11)/(70).(-7/5)   &hArr;(31)/(10)-x=-(11)/(50)   &hArr;-x=-(11)/(50)-(31)/(10)   &hArr;-x=-(11)/(50)-(155)/(50)   &hArr;-x=-(83)/(25)   &hArr;x=(83)/(25)   Vậy x=(83)/(25)