13.104/y-8.72=6.88
13.104 : x - 8.75 = 6.88
13.104 : x - 8.75 = 6.88
<=>13.104:x=15.63
=>x=2184/2605
Vậy x=2184/2605
\(13.104:x-8.75=6.88\)
\(1352:x-600=528\)
\(1352:x=528+600\)
\(1352:x=1128\)
\(x=1352:1128\)
\(x=\dfrac{169}{141}\)
tìm x
13,104:x-8,72=6.88
\(13,104:x-8,72=6,88\)
\(\Leftrightarrow13,104:x=6,88+8,72\)
\(\Leftrightarrow13,104:x=15,6\)
\(\Leftrightarrow x=13,104:15,6\)
\(\Leftrightarrow x=0,84\)
tim x trong ti le thuc : 6.88 : x = 12:27
6,88 : x = 12:27
\(\frac{172}{25}\): \(x=\frac{4}{9}\)
x = \(\frac{172}{25}:\frac{4}{9}\)
\(x=\frac{387}{25}\)
~~AI NGANG QUA XINH CHO TÔI 1 K!!~~
\(1+1=?\)
\(2.3=?\)
\(8.72:9=?\)
\(\frac{1234+4321}{4.7+5}=?\)
\(4,5.5+3,2.\frac{2}{1}=?\)
\(1+1=2\)
\(2.3=6\)
\(8.72:9=576:9=64\)
\(\frac{1234+4321}{4.7+5}=\frac{5555}{28+5}=\frac{5555}{33}=\frac{505.11}{3.11}=\frac{505}{3}\)
\(4,5.5+3,2.\frac{2}{1}=22,5+6,4=28,9\)
Y+Y+Y+Y+Y+Y+Y+Y+Y =?
y+2;y+1;y (y thuộc N*)
y+1;y;y-1 (y thuộc N*)
y-1;y-2;y-3 (y thuộc N*)
y+1+y+2+y+3+y+4+y+5+y+6+y+7+y+8+y+9+y+10=?
y+1+y+2+y+3+y+4+y+5+y+6+y+7+y+8+y+9+y+10=y x 10 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 +10
= y x 10 + 55
Dạng tổng quát là như thế!
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55 mà!
Chọn câu sai. A.x^2-y^2=(x+y)(x-y) B.(x+y)(x+y)=y^2-x^2 C.(x+y)^2=(x+y)(x-y) D.(-x-y)^2=(-x)^2-2(-x)y+y^2
Tìm y biết:
a) y x 4 + y x 6 = 240
b) y x 22 + y x 78 = 4200
c) y x 6 – y x 2 = 2844
d) y x 286 – y x 186 = 21900
e) 166 : y + 34 : y =10
g) 2125 : y – 125 : y = 80
h) (y + 5) x 2020 = (200 + 5) x 2020
i) y - 45600 = (2019 - 419) x 4 x 25