7/4-y*5/6=1/2+1/3
\(\frac{7}{4}-y\cdot\frac{5}{6}=\frac{5}{6}\)
=>\(\frac{7}{4}-y=1\)
=> \(y=\frac{7}{4}-1\)
=> \(y=\frac{3}{4}\)
bạn ơi , là 7/4-[(y*5)/6] hay 7/4-y*(5/6) ?
Tim y biet:7/4-yx5/6=1/2=1/3
Tim y biet : ( 1/2*4 + 1/4*6 + 1/6*8+ 1/8*10 ) * y = 1/3
1.tim so bi chia trong phep chia cho 12 co thuong la 35 va so du la so le co 2chu so
2.hieu cua so lon nhat co 4 chu so khac nhau va so nho nhat co 4 chu sola bao nhieu
3.mot hinh chu nhat co chieu dai gap ruoi chieu rong. Neu moi chieu tang them 1m thi duoc hinh chu nhat moi co dien tich tang them 26m2. Tinh chu vi hinh chu nhat
4.trung binh cong cua 2 phan so bang 5/12. Phan so thu nhat hon phan so thu hai 1/6. Tim phan so thu nhat
5.tim y biet (5/7 - y) nhan 4/5 =7/10 + 1/2
6.hieu 2 so =1/3 so be.Tong 2 so la 63. Tim so be
tim tong tat ca cac so tu nhien y biet 4/5>y/15>1/6
2. Tim x tren y biet
a. x/y + 4/5 = 8/6
b. x/y - 4/5 = 2/3
c. 5/8 * x/y = 5/12
d. x/y : 2/9 = 3/8
Giup minh voi tim x biet
5/3 - 1/3 : ( 1 - x . 1/3 ) = 7/6
3 - ( x : 1/2 +3/2 ) - 1/4 = 1/2
Tim so tu nhien y, biet :
a) 12 2/5 < y < 13 1/7 b) 22/5 x 2 > y > 6 1/2
12 la phan nguyen 2/5 la phan phan so. So ben kia cung nhu vay nhe.
tim y biet a 9 phan 14 nhan y = [5 phan 7 tru 3 phan 14 ]nhan 4 phan 7 b y chia 0,25 =[2,5 tru 1,3 ]chia 0,75
tim y biet: (y+1/2)+(y+1/4)+(y+1/8)+...+(y+1/1024)=1