tim x biet x nhan 2 cong x nhan 3 cong x nhan 4 cong x bang 100
bai 3 : khong lam tinh hay tim a trong cac phep tinh sau :
a] 95 x [ a - 75 ] = 95 x [ 100 - 75 ]
b ] 2003 + a x 15 = 2003 + 10 x 3 x5
minh biet la no bang nhau nhung khong biet trinh bay
ai giai nhanh duoc 3 like
Tim x,a.246: x cong 34 cong x bang 5
Tim phan so X/Y biet hieu cua X va Y bang 8 va X/Y sau khi rut gon chi bang 5/3?
Ghi them loi giai!!
tim X
a,( 25 * 12 - X - 25 ) : 25 = 4
b,180 - ( X + 15 ) : X * 20 = 100
c,125 + ( X - 25 ) * 5 + X = 150
d,X : 8 * 32 + X: 3 * 18 - X: 5 *10 = 120
tìm x biết:
a. 12+x \ 42 = 5/6
b. 25-x \ 40 = 3/8
c. 13+x \ 20 = 3/4
d. 23-x/25 = 4/5
Tim so x, biet x la trung binh cong cua 3 so: 92, 128 va x
Tim so x, biet x la trung binh cong cua 3 so: 92, 128 va x
trung binh cong cua hai so bang 15.tim hai so do biet so lon gap doi so be