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\(Y\times6+11\times\dfrac{5}{11}=2025\\ Y\times6+5=2025\\ Y\times6=2025-5\\ Y\times6=2020\\ Y=\dfrac{2020}{6}\\ Y=\dfrac{1010}{3}\)
\(y\times6+11\times\dfrac{5}{11}=2025\\ y\times6+5=2025\\y\times6=2025-5\\ y\times6=2020\\ y=2020:6\\ y=\dfrac{1010}{3}\)
9/11 : y = 2/5 + 2/7
9/11 :y = 24/35
y = 9/11 : 24/35
y = 105/88
y * 3/11 = 3/4 - 6/11
y * 3/11 = 9/44
y = 9/44 : 3/11
y = 3/4
Bạn thamkhaor nhé
\(\frac{4}{11}.y-\frac{6}{11}=\frac{2}{5}\Rightarrow\frac{4}{11}.y=\frac{52}{55}\Rightarrow y=\frac{13}{5}\)
Vậy :\(y=\frac{13}{5}\)
\(\frac{4}{11}\cdot y-\frac{6}{11}=\frac{2}{5}\)
\(\Rightarrow\frac{4}{11}\cdot y=\frac{2}{5}+\frac{6}{11}\)
\(\Rightarrow y=\frac{52}{55}:\frac{4}{11}\)
\(\Rightarrow y=\frac{13}{5}=2,6\)
Good luck!
1/5+8/15:y=1/2
8/15:y=1/5-1/2
8/15:y=-3/10
y=8/15:1/2
y=16/15
vậy y=16/15
4/11.y-6/11=2/5
4/11.y=2/5+6/11
4/11.y=52/55
y=52/55:4/11
y=13/5
vậy y=13/5
Bài 1 :
\(\frac{2}{19}+\frac{4}{5}+1\frac{7}{9}+\frac{1}{5}\)
\(=\frac{2}{19}+1\frac{7}{9}+\left(\frac{4}{5}+\frac{1}{5}\right)\)
\(=\frac{2}{19}+1\frac{7}{9}+1\)
\(=\frac{493}{171}\)
\(\frac{1}{11}+\frac{2}{11}+\frac{3}{11}+\frac{4}{11}+\frac{5}{11}+\frac{6}{11}+\frac{7}{11}+\frac{8}{11}+\frac{9}{11}+\frac{10}{11}\)
\(=\left(\frac{1}{11}+\frac{10}{11}\right)+\left(\frac{2}{11}+\frac{9}{11}\right)+\left(\frac{3}{11}+\frac{8}{11}\right)+\left(\frac{4}{11}+\frac{7}{11}\right)+\left(\frac{5}{11}+\frac{6}{11}\right)\)
\(=1+1+1+1+1\)
\(=5\)
Bài 2 :
y : (23 + 27) = 9 1000 : (y x 25) = 8
y : 50 = 9 y x 25 = 1000 : 8
y = 9 x 50 y x 25 = 125
y = 450 y = 125 : 25
133 : (190 : y) = 7 y = 5
190 : y = 133 : 7 450 : (y + 42) = 9
190 : y = 19 y + 42 = 450 : 9
y = 190 : 19 y + 42 = 50
y = 10 y = 50 - 42
y = 8
\(\frac{4}{11}.y-\frac{6}{11}=\frac{2}{5}\Leftrightarrow\frac{4}{11}y=\frac{2}{5}+\frac{6}{11}\)
\(\Leftrightarrow\frac{4}{11}y=\frac{52}{55}\Rightarrow y=\frac{52}{55}:\frac{4}{11}\)
\(\Rightarrow y=\frac{13}{5}\)
\(\frac{4}{11}\times y-\frac{6}{11}=\frac{2}{5}\)
\(\Rightarrow\frac{4}{11}\times y=\frac{2}{6}+\frac{6}{11}\)
\(\Rightarrow\frac{4}{11}\times y=\frac{29}{33}\)
\(\Rightarrow y=\frac{29}{33}:\frac{4}{11}\)
\(\Rightarrow y=\frac{29}{33}\times\frac{11}{4}\)
\(\Rightarrow y=\frac{29}{12}\)
a) 1/5 + 8/15 : y = 1/2
8/15 : y = 1/2 - 1/5
8/15 : y = 3/10
y = 8/15 : 3/10
y = 16/9
b) 4/11 x y -6/11 = 2/5
4/11 x y = 2/5 + 6/11
4/11 x y = 52/55
y = 52/55 : 4/11
y = 13/5
Nick zing của mk:
http://me.zing.vn/u/nhainhinhanh5agx/?_src=header#wall
\(2025-y\times5=135\\ \Rightarrow y\times5=2025-135\\ \Rightarrow y\times5=1890\\ \Rightarrow y=1890:5=378\)
y × 6/11 + y × 5/11 =2025
y × (6/11+5/11) =2025
y ×1 =2025
y =2025
y × 6/11 + y × 5/11 =2025
y × (6/11+5/11) =2025
y ×1 =2025
y =2025