\(a,\frac{1313}{2828}+x=\frac{2323}{4646}\)

\(\frac{13}{28}+x=\frac{1}{2}\)

\(x=\frac{1}{2}-\frac{13}{28}=\frac{1}{28}\)

\(b,\frac{5}{7}+\frac{x}{35}=\frac{4}{5}\)

\(\frac{x}{35}=\frac{4}{5}-\frac{5}{7}=\frac{3}{35}\)

\(\Rightarrow x=3\)

\(c,\frac{23}{69}-x=\frac{17}{153}\)

\(\frac{1}{3}-x=\frac{1}{9}\)

\(x=\frac{1}{3}-\frac{1}{9}=\frac{2}{9}\)

\(a,\frac{1313}{2828}+x=\frac{2323}{4646}\)

\(\frac{13}{28}+x=\frac{1}{2}\)

\(x=\frac{1}{2}-\frac{13}{28}=\frac{1}{28}\)

\(b,\frac{5}{7}+\frac{x}{35}=\frac{4}{5}\)

\(\frac{x}{35}=\frac{4}{5}-\frac{5}{7}=\frac{3}{35}\)

\(\Rightarrow x=3\)

\(c,\frac{23}{69}-x=\frac{17}{153}\)

\(x=\frac{23}{69}-\frac{17}{153}=\frac{2}{9}\)

a)\(\Leftrightarrow\)\(x=\dfrac{2323}{4646}-\dfrac{1313}{2828}\)

\(\Leftrightarrow\)\(x=\dfrac{1}{28}\)

b)\(\Leftrightarrow\)\(x=\dfrac{23}{69}-\dfrac{17}{153}\)

\(\Leftrightarrow\)\(x=\dfrac{2}{9}\)

a) \(\dfrac{1313}{2828}\) + \(x\) = \(\dfrac{2323}{4646}\)

\(\dfrac{13}{28}\) + \(x\) = \(\dfrac{1}{2}\)

\(x=\dfrac{1}{2}-\dfrac{13}{28}\)

\(x=\dfrac{14}{28}-\dfrac{13}{28}\)

\(x=\dfrac{1}{28}\)

b) \(\dfrac{23}{69}-x=\dfrac{17}{153}\)

\(\dfrac{1}{3}-x=\dfrac{1}{9}\)

\(x=\dfrac{1}{9}+\dfrac{1}{3}\)

\(x=\dfrac{1}{9}+\dfrac{3}{9}\)

\(x=\dfrac{4}{9}\)

a: =>x+7/4=6:2/3=9

=>x=29/4

b: =>x:5/3=7/5

=>x=7/5*5/3=7/3

c:=>x+1/6=5/3

=>x=10/6-1/6=3/2

d: =>x+4/5=4/5+3/7+3/5

=>x=3/7+3/5=36/35

e: =>x/35=4/5-5/7=3/35

=>x=3

f: =>13/28+x=1/2

=>x=1/28

g: =>1/3-x=1/9

=>x=2/9

x=1/28

x = 2323/4646-1313/2828

x= 1/28

\(\dfrac{1313}{2828}+x=\dfrac{2323}{4646}\\ \dfrac{13}{28}+x=\dfrac{1}{2}\\ x=\dfrac{1}{2}-\dfrac{13}{28}\\ x=\dfrac{14}{28}-\dfrac{13}{28}\\ x=\dfrac{1}{28}\)

bạn tách câu ra

tức là hỏi từng câu 1 thôi

Hơi dài bạn ạ

a)

= 7/12 + 6/36

= 7/12 + 1/6

= 7/12 + 2/12

= 9/12 = 3/4

b)

= 8/9 - 4/15 x 5/2

= 8/9 - 20/30

= 8/9 - 2/3

= 8/9 - 6/9

= 2/9

= \(\frac{12}{13}\)

= \(\frac{145}{153}\)

= 12/13

= 145/153

..............

x = 1313/1010 - 1414/2828

x = 4/5

x = 1414/2828 - 1313/1010

x = -4/5 

4/5