Cho x, y, z thuoc Z biet :
a/ /x/ + 1963 la gia tri nho nhat
b/ /x/ + /y/ + /z/ be hon hoac bang 0
tim x y thuoc z biet x mu 2 cong y nhan x cong y mu 2 bang x mu hai nhan y mu hai
Tim x thuoc Z biet :
a . | 2x - 5 | = 13
b. | 7x + 3 | = 66
c. | 5x - 2 | < hoac bang 13
Giup to voi
cho x=a/b y=c/d z=a+c/b+d. (x,y,z thuoc Z)biet y>x CmR x<z<y
Cho A thuoc {0.1.2.3.4.5.6.7.8.9.10} biet A co hon 1 phan tu neu x,y,z thuoc A va x<y<z thi z =x.y tim A
cho a thuoc z. tim so nguyen x, biet
a) a+x=5
b) a-x=2
cho a thuoc Z. tim so nguyen x, biet
a. a + x = 5
b. a - x = 2
Tim x, y thuoc Z biet : | x + 45 - 40 | + | y + 10 - 11 | nho hon hoac bang 0
tim x;y thuoc z biet y phan tru 2 bang x tru 2 nhan y phan x
2 nhan x phan 3 nhan y cong x bang1 phan y
