Toán Lớp 6: jup e vs a) 4(x -3) = 48 b) (17x –25) : 23+ 65 = 92c) 32(x + 4) -52= 5.22d) (x -2)2=

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Toán Lớp 6:  jup e vs a) 4(x -3) = 48                                                   b) (17x –25) : 23+ 65 = 92c) 32(x + 4) -52= 5.22d) (x -2)2= ( x -2)5

thanhmaianh · Answer

Giải đáp:    a)  x           = 15     b)            x                   =  38     c)x                        = 1,0625     d)    Lời giải và giải thích chi tiết:    a) 4(x -3) = 48        x - 3      = 48 : 4        x  -  3    = 12            x        = 12 + 3         x           = 15     b) (17x &ndash;25) : 23+ 65 = 92          ( 17x- 25) : 23      = 92 - 65          ( 17x - 25) : 23      = 27           17x - 25              = 27.23            17x - 25              = 621              17 . x                = 621 + 25             17 . x                 =  646                    x                 = 646 : 17                  x                   =  38     c) 32(x + 4) -52= 5.22      32 (x + 4) - 52 = 110     32 . ( x + 4)       = 110 + 52     32 . (x + 4)        =  162     x + 4                 = 162 : 32     x + 4                 = 5,0625      x                       = 5,0625 - 4     x                        = 1,0625     d) (x -2)2= ( x -2)5         Xin lỗi phần n&agrave;y mik ko biết ak

trucoanh55 · Answer

Giải đáp:   a) $4 left(x-3 right)=48$   $ &hArr; frac{4 left(x-3 right)}{4}= frac{48}{4}$   $ &hArr;x-3=12$   $ &hArr;x-3+3=12+3$   $ &hArr;x=15$   b) $ frac{ left(17x-25 right)}{23+65}=92$   $ &hArr; frac{88 left(17x-25 right)}{23+65}=92.88$   $ &hArr;17x-25=8096$   $ &hArr;17x-25+25=8096+25$   $ &hArr;17x=8121$   $ &hArr; frac{17x}{17}= frac{8121}{17}$   $ &hArr;x= frac{8121}{17}$   c) $32 left(x+4 right)-52=5.22$   $ &hArr;32 left(x+4 right)-52+52=5.22+52$   $ &hArr;32 left(x+4 right)=57.22$   $ &hArr; frac{32 left(x+4 right)}{32}= frac{57.22}{32}$   $ &hArr;x+4=1.788125$   $ &hArr;x+4-4=1.788125-4$   $ &hArr;x=-2.211875$   d) $ left(x-2 right). 2= left(x-2 right). 5$   $ &hArr;2x-4=5x-10$   $ &hArr;2x-4+4=5x-10+4$   $ &hArr;2x=5x-6$   $ &hArr;2x-5x=5x-6-5x$   $ &hArr;-3x=-6$   $ &hArr; frac{-3x}{-3}= frac{-6}{-3}$   $ &hArr;x=2$