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a) y × 5 = 41 , 55 − 1 , 3 → y = 8 , 5 → S
y = 8 , 05 → Đ
b) x : 7 , 5 = 3 , 7 + 4 , 1 → x = 58 , 5 → Đ
x = 5 , 85 → S
a , y × 5 = 41 , 55 − 1 , 3 → y = 8 , 5 S y = 8 , 05 Đ b , x : 7 , 5 = 3 , 7 + 4 , 1 → x = 58 , 5 Đ x = 5 , 85 S
y x ( 2 + 1/5 ) = 8/5
y x 11 /5 = 8/5
Đến đây bạn tự giải đi nha
y x 25 + y x 1,5 - y x 6,5=2014
y x (25+ 1,5- 6,5) = 2014
y x 20 = 2014
y = 2014 : 20
y=100,7
=17/6:(1-2/3)
=17/6:1/3
=17/2
=13/6×9/2-6/7
=39/4-6/7
=249/28
a) \(\left(\frac{5}{2}+\frac{1}{3}\right):\left(1-\frac{2}{3}\right)=\left(\frac{15}{6}+\frac{2}{6}\right):\frac{1}{3}\)
\(=\frac{17}{6}:\frac{1}{3}=\frac{17}{6}\cdot\frac{3}{1}=\frac{17}{2}\cdot\frac{1}{1}=\frac{17}{2}\)
b) \(\left(\frac{5}{2}-\frac{1}{3}\right)\cdot\frac{9}{2}-\frac{6}{7}=\left(\frac{15}{6}-\frac{2}{6}\right)\cdot\frac{9}{2}-\frac{6}{7}\)
\(=\frac{13}{6}\cdot\frac{9}{2}-\frac{6}{7}=\frac{13}{2}\cdot\frac{3}{2}-\frac{6}{7}=\frac{39}{4}-\frac{6}{7}=\frac{273}{28}-\frac{24}{28}=\frac{249}{28}\)
\(Y:\dfrac{7}{5}=\dfrac{5}{6}+\dfrac{5}{12}=\dfrac{15}{12}\\ Y=\dfrac{15}{12}\times\dfrac{7}{5}=\dfrac{7}{4}\)
\(y:\dfrac{7}{5}=\dfrac{5}{6}+\dfrac{5}{12}\\ \Leftrightarrow y:\dfrac{7}{5}=\dfrac{5\times2}{6\times2}+\dfrac{5}{12}\\ \Leftrightarrow y:\dfrac{7}{5}=\dfrac{10}{12}+\dfrac{5}{12}\\ \Leftrightarrow y:\dfrac{7}{5}=\dfrac{15}{12}\\ \Leftrightarrow y:\dfrac{7}{5}=\dfrac{5}{4}\\ \Leftrightarrow y=\dfrac{5}{4}\times\dfrac{7}{5}\\ \Leftrightarrow y=\dfrac{7}{4}\)
\(\Rightarrow C\)
y : 0,25 + y : 0,5 + y : 0,01 + y = 214
y : \(\frac{1}{4}\)+ y :\(\frac{1}{2}\)+ y : \(\frac{1}{100}\)+ y = 214
y x 4 + y x 2 + y x 100 + y x 1 = 214
y x ( 4 + 2 + 100 + 1 ) = 214
y x 107 = 214
y = 214 : 107
y = 2.
Vậy y = 2.
~Chúc bạn hok tốt~
#Sa-ngu-ngốc
a) y x 5 = 41,55 - 1,3
y x 5 = 40,25
y = 40,25 : 5
y = 8,05
b) 6 x y = 74,04 + 4,08
6 x y = 78,12
y = 78,12 : 6
y = 13,02
Chúc bạn học tốt!
a) y x 5 = 41,55 - 1,3
y x 5 = 40,25
y = 40,25 : 5
y = 8,05
b) 6 x y = 74,04 + 4,08
6 x y = 78,12
y = 78,12 : 6
y = 13,02