Toán Lớp 6: x-6=65:63 46x-25=92 42x+43=75 4(x-3)=72-110 128-3(x-4)=23 mình căm ơn

Question

Toán Lớp 6:  x-6=65:63 46x-25=92 42x+43=75 4(x-3)=72-110 128-3(x-4)=23            mình căm ơn

kimlien · Answer

x-6=65&divide;63    x=65&divide;63+6   x=$ dfrac{443}{63}$    46x-25=92    46x=92+25   46x=117   x=$ frac{117}{46}$     42x+43=75    42x=75&minus;43   42x=32   x=$ frac{16}{21}$     4(x-3)=72-110    4x+4&times;(&minus;3)=72&minus;110   4x&minus;12=72&minus;110   4x&minus;12=&minus;38   4x=&minus;38+12   4x=&minus;26   x=$ frac{&minus;13}{2}$     128-3(x-4)=23    128&minus;3x&minus;3&times;(&minus;4)=23   128&minus;3x+12=23   140&minus;3x=23   &minus;3x+140=23   &minus;3x=23&minus;140   &minus;3x=&minus;117   3x=117   x=39      cho m&igrave;nh năm sao nha chủ tus         ch&uacute;c bạn học tốt

landinhngoc97 · Answer

a) x - 6 = 65 : 63   x - 6 = 1,037    x = 1,037 + 6     x = 7,037    b) 46x - 25 = 92   46x - 92 + 25   46x = 117   x = 117 : 46   x =  2.543     c) 42x + 43 = 75     42x = 75 - 43     42x = 32     x = 32 : 42     x = 32/42     d) 4(x - 3) = 72 - 110     4(x - 3) = -38     x - 3 = -38 + 4     x - 3 = -34     x = -34 + 3     x = -31     e) 128 - 3(x - 4) = 23     3(x - 4) = 128 - 23     3(x - 4) = 105     x - 4 = 105 : 3     x - 4 = 35     x = 39