=5435029353

đúng chắc luôn

tick nha

OLM trừ điểm anh trần văn duy đi!

=10344

\(=10344\)

X=7778+1912

X=9690

X=9690x8

X=77520

X=77520:3

X=25840

vậy X=25840

X x 3:8 - 1912 = 7778

X                   = 7778 + 1912

X                   = 9690

X                   =9690 x 8

X                   = 77520

X                   = 77520:3

X                   = 25840

Đáp số : X = 25840

bạn chép rõ ràng đi. minh giai cho

x * 3 : 8 - 1912 = 7778

x * 3 : 8           = 7778 + 1912

x * 3 : 8           =       9690

x * 3                =   9690 * 8

x * 3                =     77520

x                     =  77520 : 3

x                     =      25840

Ta có: 7778² - 2223² = (7778 - 2223)(7778 + 2223) = 5555 . 10001 = 55555555

=> Hiệu 7778² - 2223² là 1 số gồm toàn các chữ số giống nhau.

gom vô

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(1111+8889)+(2222+7778)+(4444+5556)

=10000+10000+10000
Đây nha 

X x 3 : 8 - 1912 = 7778 

X x3 : 8             = 7778 + 1912 

X x 3 : 8            = 9690

X x 3                 = 9690 x 8 

X x 3                 = 77520

X                       = 77520 : 3 

X                       = 25840

vây X - 25840

thi ra la vay cam on nha

88881/88889>7772/7778

ghi cách làm nữa