a. \(\frac{1}{4}=\frac{12}{y}\)
\(\Leftrightarrow1y=4.12\)
\(\Leftrightarrow y=48\)
b. \(47,5y+52,5y=2,69\)
\(\Leftrightarrow y\left(47,5+52,5\right)=2,69\)
\(\Leftrightarrow100y=2,69\)
\(\Leftrightarrow y=2,69\div100\)
\(\Leftrightarrow y=0,0269\)
a. \(\frac{1}{4}=\frac{12}{y}\)
\(\Leftrightarrow1y=4.12\)
\(\Leftrightarrow y=48\)
b. \(47,5y+52,5y=2,69\)
\(\Leftrightarrow y\left(47,5+52,5\right)=2,69\)
\(\Leftrightarrow100y=2,69\)
\(\Leftrightarrow y=2,69\div100\)
\(\Leftrightarrow y=0,0269\)
Cho dãy tính sau
\(Y=1+\frac{1}{3}+\frac{1}{6}+\frac{1}{9}+\frac{1}{12}+.......+\frac{1}{201}-\frac{x}{y}=0,5\).Tìm kết quả của Y ,x và y
Bài 2:Tìm y
a) 242/363 + 1616/2121 = 2/7 x y
b) (y + 1/4) + (y + 1/16) + (y + 1/16) =2
Tìm số tự nhiên x và y (x < y)
a) \(\frac{1}{x}\) + \(\frac{1}{y}\) = \(\frac{8}{15}\)
x = ..............
y = ..............
b) \(\frac{2}{x}\) + \(\frac{1}{y}\) = \(\frac{11}{12}\)
x = .............
y = .............
1.Tìm y
a) y3 + 3y = 12 x 11
b) 64 x y + 225 = 700 - 75 - 36 x y
2.Tính
a)\(\frac{4343}{7171}+\frac{4343}{7171}+\frac{4343}{7171}+\frac{4343}{7171}\)
b) A = \(\frac{1}{33}\times\left(\frac{33}{12}+\frac{3333}{2020}+\frac{333333}{303030}+\frac{33333333}{42424242}\right)\)
tìm x,y :
\(\frac{1}{2}-\left(6\frac{5}{9}+x-\frac{117}{8}\right):\left(12\frac{1}{9}\right)=0\)
\(\left(y+\frac{1}{3}\right)+\left(y+\frac{2}{9}\right)+\left(y+\frac{1}{27}\right)+\left(y+\frac{1}{81}\right)=\frac{56}{81}\)
tìm y ,biết:(\(4\frac{46}{65}\)+y)x \(1\frac{1}{12}\)= 5,75
guips mk với mk cần gấp
Tìm y biết: 0,1 - y: 0,25 - y x 3/4 = 52,5
Bài 3 : Tìm y ,x
a) 71 + 65 x 4 = \(\frac{X+140}{X}+260\)
b) y x 15/2 - 1/3 x ( 1/4 + y ) = \(96\frac{2}{3}\)
1.Tìm X hoặc Y:
X x 0,75 = \(\frac{12}{5}\)(cau1)
30% x X + X =52(cau2)
75%x X+ \(\frac{3}{4}\)x X +X=30(cau3)
Y + Y : 3 x 4,5 +Y : 2 x 7 =252(cau4)
thanks,help me!!!gap