Toán Lớp 6: 6. X-6=24 X.5-127=273 21.(32-X)=21 214-12.X=70 108-X.18=54 200-(8.X+7 )=121

Question

Toán Lớp 6:  6. X-6=24  X.5-127=273  21.(32-X)=21  214-12.X=70  108-X.18=54  200-(8.X+7 )=121

lanminhngoc · Answer

1.    6.x-6=24   6.x=24+6=30   x=30:6=5      2   . x.5-127=273   x.5=273+127=400   x=400:5   x=80      3.    21.(32-x)=21   32-x=21:21=1   x= 32-1=31      4.    214-12.x= 70   12.x=214-70=144   x=144:12   x=12      5.    108-x.18=54   x.18=108-54=54   x= 54:18=3      6.    200-(8.x+7)= 121   8.x+7= 200-121= 79   8.x=79-7=72   x= 72:8=9

maingocquynhnhu2k1 · Answer

Giải đáp:     6 . x - 6 = 24   &rArr; 6 . x     = 24 + 6   &rArr; 6 . x     = 30   &rArr; x          = 30 : 6   &rArr; x           = 5.   Vậy,x = 5     x . 5 - 127 = 273   &rArr; x . 5  = 273 + 127   &rArr; x . 5 = 400   &rArr; x      = 400 : 5   &rArr; x      = 80.   Vậy,x = 80     21 . ( 32 - x ) = 21   &rArr; ( 32 - x ) = 21 : 21   &rArr; 32 - x     = 1   &rArr; x             = 32 - 1   &rArr; x             = 31.    Vậy,x = 31     214 - 12 . x = 70   &rArr; 12 . x         = 214 - 70   &rArr; 12 . x         = 144   &rArr;        x         = 144 : 12   &rArr;        x          = 12   Vậy, x = 12         108 - x . 18= 54     &rArr; x . 18           = 108 - 54     &rArr; x . 18           = 54     &rArr; x                  = 54 : 18     &rArr; x                  = 3.     Vậy, x = 3.           200 - ( 8 . x + 7 ) = 121     &rArr; 8 . x + 7                = 200 - 121     &rArr; 8 . x + 7                = 79     &rArr; 8 . x                       = 79 - 7     &rArr; 8 . x                       = 72     &rArr; x                            = 72 : 8     &rArr; x                            = 9.     Vậy, x = 9.          #ngocanhcutehg1