Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
1 1/2 + 1 1/5 * y - 4/5 = 2 4/5
3/2 + 6/5 * y - 4/5 = 14/5
3/2 + 6/5 * y = 14/5 + 4/5
3/2 + 6/5 * y = 18/5
6/5 * y = 18/5 - 3/2
6/5 * y = 21/10
y = 21/10 : 6/5
y = 7/4
1 1/2 + 1 1/5 * y - 4/5 = 2 4/5
3/2 + 6/5 * y - 4/5 = 14/5
3/2 + 6/5 * y = 14/5 + 4/5
3/2 + 6/5 * y = 18/5
6/5 * y = 18/5 - 3/2
6/5 * y = 21/10
y = 21/10 : 6/5
y = 7/4
\(2\dfrac{2}{5}-y:2\dfrac{3}{4}=1\dfrac{1}{2}\\ \dfrac{12}{5}-y:\dfrac{11}{4}=\dfrac{3}{2}\\ y:\dfrac{11}{4}=\dfrac{12}{5}-\dfrac{3}{2}\\ y:\dfrac{11}{4}=\dfrac{9}{10}\\ y=\dfrac{9}{10}\times\dfrac{11}{4}=\dfrac{99}{40}\\ b,1\dfrac{1}{4}+2\dfrac{1}{5}\times y=2\dfrac{3}{5}\\ \dfrac{5}{4}+\dfrac{11}{5}\times y=\dfrac{13}{5}\\ \dfrac{11}{5}\times y=\dfrac{13}{5}-\dfrac{5}{4}\\ \dfrac{11}{5}\times y=\dfrac{27}{20}\\ y=\dfrac{27}{20}:\dfrac{11}{5}=\dfrac{27}{44}\)
\(c,2\dfrac{4}{5}-2\dfrac{1}{4}:y=\dfrac{3}{4}\\ \dfrac{14}{5}-\dfrac{9}{4}:y=\dfrac{3}{4}\\ \dfrac{9}{4}:y=\dfrac{14}{5}-\dfrac{3}{4}\\ \dfrac{9}{4}:y=\dfrac{41}{20}\\ y=\dfrac{9}{4}:\dfrac{41}{20}=\dfrac{45}{41}\\ c2,x:3\dfrac{1}{3}=2\dfrac{2}{5}+\dfrac{7}{10}\\ x:\dfrac{10}{3}=\dfrac{12}{5}+\dfrac{7}{10}\\ x:\dfrac{10}{3}=\dfrac{31}{10}\\ x=\dfrac{31}{10}\times\dfrac{10}{3}=\dfrac{31}{3}\)
1/2 - y = 4/5 : 4
=> 1/2 - y = 1/5
=> y = 1/2 - 1/5
=> y = 3/10
\(\frac{1}{2}\)\(-y=\frac{4}{5}\)\(\div4\)
\(\frac{1}{2}\)\(-y=\frac{1}{5}\)
\(y=\frac{1}{2}\)\(-\frac{1}{5}\)
\(y=\frac{3}{10}\)