16 = 4x
x la ich so nhe
tim x biet 35 < ich <55 va ich la so chia het cho 5 va2
x = 40 hay 50
40,50 đúng ko bạn
Tìm X:
4xX/1x5+4xX/5x9+4xX/9x13+4xX/13x17=16
\(\dfrac{4\times x}{1\times5}\) + \(\dfrac{4\times x}{5\times9}\) + \(\dfrac{4\times x}{9\times13}\) + \(\dfrac{4\times x}{13\times17}\) = 16
\(x\times\left(\dfrac{4}{1\times5}+\dfrac{4}{5\times9}+\dfrac{4}{9\times13}+\dfrac{4}{13\times17}\right)\) = 16
\(x\) \(\times\) (\(\dfrac{1}{1}\) - \(\dfrac{1}{5}\) + \(\dfrac{1}{5}\) - \(\dfrac{1}{9}\) + \(\dfrac{1}{9}\) - \(\dfrac{1}{13}\) + \(\dfrac{1}{13}\) - \(\dfrac{1}{17}\)) = 16
\(x\) \(\times\) ( \(\dfrac{1}{1}\) - \(\dfrac{1}{17}\)) = 16
\(x\) \(\times\) \(\dfrac{16}{17}\) = 16
\(x\) = 16 : \(\dfrac{16}{17}\)
\(x\) = 17
dien ich rung cuc phuong la 22200ha .hay viet so do die tich khu rung do duoi dang so do co don vi la ki - lo met vuong .
Đổi 22 200 ha = 222 km2.Vậy diện tích rừng Cúc Phương là 222 km2
moi phep nhan voi 127. Do so y nen An viet nham so 7 cua thua so thu 2 thanh 4 nen tich giam di 1245 don vi.T ich dung la ......
6+4xX=38+16
\(6+4\cdot x=38+16\)
\(\Rightarrow6+4\cdot x=54\)
\(\Rightarrow4\cdot x=54-6\)
\(\Rightarrow4\cdot x=48\)
\(\Rightarrow x=\dfrac{48}{4}=12\)
6 + 4 x X = 38 + 16
6 + 4 x X = 54
4 x X = 54 - 6
4 x X = 48
X = 48 : 4
X = 12.
Vậy X = 12.
(4xX-0,8) :X+14,5=16
( 4 x X - 0.8 ) : X + 14.5 = 16
( 4 x X - 0.8 ) : X = 16 - 14.5
4 x X - 0.8 = 1.5 x X
4 x X - 1.5 x X = 0.8
( 4 - 1.5 ) x X = 0.8
2.5 x X = 0.8
X = 0.8 : 2.5
X = 0.32
S XUNG QUANH LA 16.HOI CANH LA BAO NHIEU
AI NHANH MIK TK VA KB NUA NHE
Tim so tu nhien y, biet :
a) 12 2/5 < y < 13 1/7 b) 22/5 x 2 > y > 6 1/2
tren la 12 la hon so, 2/5 la phan so nhe, ben kia cung vay nhe. Mong cac ban giai bai ho minh som nhe.
voi dieu kien nao thi hieu cua hai so tu nhien cung la so tu nhien. hieu cua hai so nguyen cung la so nguyen. cho vi du
GIUP MINH NHE / CAM ON TRUOC
KET BAN VOI MINH NHE
a
Voi dieu kien :
Hai so do >0
So bi tru >so tru
b
Voi dieu kien
So bi tru la so nguyen
So tru la so >=0
CO AI CHOI NGOC RONG ONLINE KO CHO MINH CAI NICK