1.Chia mot hinh vuong co dien tich 36cm vuong thanh 2 hinh chu nhat bang nhau.Tinh chu vi moi hinh chu nhat sau khi chia ra

2.Tim X la phan so,biet

a,7 x X=4

b,X x 2 = 1

c,1 chia X = 3

d,4 chia X = 9

giup minh voi

Tim so tu nhien x , biet ;

a] Phan so x/35 co gia tri bang 4.

b] phan so 7/x co gia tri bang 1/2

1.Tim x la phan so biet

a,7 x X = 4

b,X x 2 =1

c,1 chia X = 3

d,4 chia X =9

mong mng giup do

bai 1; tim so x lon nhat sao cho 198+x va 270 - x deu  chia het cho x

bai 2 ; mot dam dat  hinh chu nhat dai 88 m, rong 52m. Nguoi ta muon chia dam dat do thanh nhung hinh vuong bang nhau , lon nhat . Hoi canh o vuong bang bao nhieu(do dai moi canh la 1 so tu nhien voi don vi la m )

tim cac so x,y,z biet x -1 phan 2  bang y cong 3 phan 4 bang z-5 phan 6 va 5z - 5x - 4y bang 50

tim z,y,z thoa

can x cong can  tat ca y tru 1 cong can  tat ca z tru 2 bang 1 phan 2 ( x cong y cong z)

tim GTN cua B bang 1 phan x tru can x cong 1

tim x thuoc z de can x cong 1 phan can 3 tru 3 la so nguyen

tinh tong T bang 1 phan can 1 cong can 2 cong 1 phan can 2 cong can 3 cong ... cong den 1 phan can 99 cong can 100

De tim so tu nhien x,biet rang neu lay so do tru di 3 roi chia cho 8 thi duoc 12 , ta co the viet (x-3) chia cho 8 =12 roi tim x,ta duoc x =99

Bang cach lam nhu tren ,hay tim so tu nhien x ,biet rang neu nhan no voi 3 roi tru di 8 ,sau do chia cho 4 thi duoc 7

Giup minh nha moi nguoi

1 tim cac so nguyen x,y biet x/7=6/21 -5/y=20/28 1/2=x/12 x/8=-28/32 3/y=12/24 3/4=15/y 2 viet 3 phan so bang phan so -10/15