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\(x-\frac{7}{8}\)\(\div\frac{3}{4}\)\(=\frac{19}{16}\)
\(x-\frac{7}{8}=\frac{19}{16}\times\frac{3}{4}\)
\(x-\frac{7}{8}=\frac{57}{64}\)
\(x=\frac{57}{64}+\frac{7}{8}\)
\(x=\frac{57}{64}+\frac{56}{64}\)
\(x=\frac{57+56}{64}\)
\(x=\frac{113}{64}\)
Học tốt!!!
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Đề là tìm x?
\(x-\frac{4}{5}:\frac{2}{7}=\frac{8}{35}\)
\(x-\frac{4}{5}\times\frac{7}{2}=\frac{8}{35}\)
\(x-\frac{4\times7}{5\times2}=\frac{8}{35}\)
\(x-\frac{28}{10}=\frac{8}{35}\)
\(x=\frac{8}{35}+\frac{28}{10}\)
\(x=\frac{16}{70}+\frac{196}{70}\)
\(x=\frac{16+196}{70}\)
\(x=\frac{212}{70}=\frac{106}{35}\)
Vậy x = 106/35
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x-\frac{4}{5}:\frac{2}{7}=\frac{8}{35}\)
\(x-\frac{4}{5}x\frac{7}{2}=\frac{8}{35}\)
\(x-\frac{14}{5}=\frac{8}{35}\)
\(x=\frac{8}{35}+\frac{14}{5}\)
\(x=\frac{8}{35}+\frac{89}{35}\)
\(x=\frac{97}{35}\)
# Chúc bạn học tốt #
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\(\frac{7}{4}-x.\frac{3}{4}=\frac{5}{19}\)
\(\Rightarrow1+\frac{3}{4}-x.\frac{3}{4}=\frac{5}{9}\)
\(\Rightarrow\frac{3}{4}.\left(1-x\right)=\frac{5}{9}-1=-\frac{4}{9}\)
\(\Rightarrow1-x=-\frac{4}{9}:\frac{3}{4}=-\frac{16}{27}\)
\(\Rightarrow x=1-\left(-\frac{16}{27}\right)=1+\frac{16}{27}=1\frac{16}{27}\)
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a)=(3/8+10/16)+(7/12+10/24)
=1+1=2
c)=(4/6+14/6)+(7/13+19/13)+(17/9+1/9)
=3+2+2=7
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a) (x.7 +8):5=10
x.7 +8= 10.5=50
x.7= 50-8=42
x= 42:7=6
b) 280: (7+3.x)=4
7+3.x= 4.280= 1120
3.x= 1120-7 =1113
x= 1113: 3= 371
c) (x.5) .19:13= 57
(x.5). 19= 57.13= 741
x.5= 741: 19= 39
x= 39:5 =7,8
d) 6.(28-8).x = 72
20.x= 72:6= 12
x= 12: 20= 0,6
e) 4. (36-4.x)= 3,2
36-4.x= 32:4= 0,8
-4.x= 0,8- 36= -35,2
x= -35,2 : -4 = 8,8
f) (x-15).3 :12= 6
(x-15).3 = 6. 12= 72
x-15= 72: 3= 24
x= 24+ 15= 39
g) (x:4+ 6) . 7 = 70
x:4+6= 70:7= 10
x:4= 10-6= 4
x= 4.4 = 16
h) (x:2+50) :5= 12
x:2+ 50= 12.5= 60
x:2= 60-50= 10
x= 10.2=20
l) 5.(7+3.x)= 140
7+3.x= 140:5 = 28
3.x= 28-7 =21
x= 21: 3= 7
k cho mình nhe
\(x-\frac{7}{8}:\frac{3}{4}=\frac{19}{16}\)
\(x-\frac{7}{6}=\frac{19}{16}\)
\(x=\frac{19}{16}+\frac{7}{6}\)
\(x=\frac{113}{48}\)