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a: =>x=3/7+3/5=15/35+21/35=36/35
b: =>x/35=4/5-5/7=28/35-25/35=3/35
=>x=3
c: =>x<3/4+8/4=11/4
=>\(x\in\left\{0;1;2;3\right\}\)
d: =>5/3<x<5/6+24/6=29/6
=>\(x\in\left\{2;3;4\right\}\)
e: =>x<10/12-9/12=1/12
=>x=0
f: =>2/3<x<12/6-5/6=7/6
=>x=1
x:3/4 = 5/6
x = 5/8
b) x -2/3 = 4/6 = 2/3
x = 4/3
c) 7/10 : x = 7/2
x = 1/5
d) 5/8 : x = 5
x = 1/8
X : 3/4=5/6
X=5/6x3/4
X=5/8
X - 2/3=4/6
X=4/6+2/3
X=4/3
7/10 : X=7/2
X=7/10:7/2
X=1/5
5/8 : X= 5
X=5/8:5
X=1/8
K MK NHAAA
\(\dfrac{3}{7}\times x=\dfrac{1}{3}\)
\(x=\dfrac{1}{3}:\dfrac{3}{7}\)
\(x=\dfrac{7}{9}\)
\(x:\dfrac{6}{8}=\dfrac{2}{5}\)
\(x=\dfrac{2}{5}\times\dfrac{6}{8}\)
\(x=\dfrac{6}{20}=\dfrac{3}{10}\)
\(x-\dfrac{2}{3}=\dfrac{5}{6}\)
\(x=\dfrac{5}{6}+\dfrac{2}{3}\)
\(x=\dfrac{9}{6}=\dfrac{3}{2}\)
\(x-\dfrac{2}{5}-\dfrac{4}{35}=\dfrac{1}{7}\)
\(x=\dfrac{1}{7}+\dfrac{4}{35}+\dfrac{2}{5}\)
\(x=\dfrac{23}{35}\)
.
\(\frac{2}{7}\cdot\frac{x}{3}\cdot\frac{4}{5}=\frac{2}{3}\cdot\frac{4}{5}\cdot\frac{6}{7}\)
\(\frac{2}{7}\cdot\frac{x}{3}\cdot\frac{4}{5}=\frac{16}{35}\)
\(\Rightarrow\frac{16}{35}:\frac{4}{5}:\frac{2}{7}\)
\(\Rightarrow2\)
Mà : \(2=\frac{x}{3}\)
Suy ra số \(x\)cần tìm là:
\(2\cdot3=6\)
Đáp số : \(6\)
a)x : 2/5 = 3/7
= \(\dfrac{3}{7}x\dfrac{2}{5}=\dfrac{6}{35}\)
b) 6/5 - x = 7/8
\(x=\dfrac{6}{5}-\dfrac{7}{8}\)
\(x=\dfrac{13}{40}\)
a) x : 2/5 = 3/7
x = 3/7 x 2/5
x = 6/35
b) 6/5 - x = 7/8
x = 6/5 - 7/8
x = 13/40
#Tick cho mik nha
# học tốt :3
x : 6/7 - x = 2/3
x : 6/7 - x : 1 = 2/3
x : ( 6/7 - 1 ) = 2/3
x : -1/7 = 2/3
x = 2/3 x -1/7
x = -2/21
tk mk nhé
X + 5/9 = 4/3
X = 4/3 - 5/9
X = 7/9
X - 4/9 = 1/2
X = 1/2 + 4/9
X = 17/18
6/13 + X = 7/6
X = 7/6 - 6/13
X = 55/78
13/5 - X = 5/6
X = 13/5 - 5/6
X= 53/30
X + 5/9 = 4/3
x = 4/3 - 5/9
x = 7/9
X - 4/9 = 1/2
x = 1/2 + 4/9
x = 17/18
6/13 + X = 7/6
x = 7/6 - 6/13
x - 55/78
13/5 - X = 5/6
x = 13/5 - 5/6
x = 53/30
Tìm x:
\(a.\dfrac{35}{28}-x=\dfrac{5}{14}\\ x=\dfrac{35}{28}-\dfrac{5}{14}\\ x=\dfrac{25}{28}\\ b.\dfrac{6}{7}\times x=\dfrac{2}{3}\\ x=\dfrac{2}{3}:\dfrac{6}{7}\\ x=\dfrac{7}{9}\\ c.x\times7=\dfrac{3}{4}\\ x=\dfrac{3}{4}:7\\ x=\dfrac{3}{28}\\ d.2:x-\dfrac{1}{3}=\dfrac{2}{5}\\ 2:x=\dfrac{2}{5}+\dfrac{1}{3}\\ 2:x=\dfrac{11}{15}\\ x=2:\dfrac{11}{15}\\ x=\dfrac{30}{11}.\)
\(a,\dfrac{35}{28}-x=\dfrac{5}{14}\)
\(x=\dfrac{35}{28}-\dfrac{5}{14}\)
\(x=\dfrac{25}{28}\)
\(b,\dfrac{6}{7}\times x=\dfrac{2}{3}\)
\(x=\dfrac{2}{3}:\dfrac{6}{7}\)
\(x=\dfrac{7}{9}\)
\(c,x\times7=\dfrac{3}{4}\)
\(x=\dfrac{3}{4}:7\)
\(x=\dfrac{3}{28}\)
\(d,2:x-\dfrac{1}{3}=\dfrac{2}{5}\)
\(2:x=\dfrac{2}{5}+\dfrac{1}{3}\)
\(2:x=\dfrac{11}{15}\)
\(x=2:\dfrac{11}{15}\)
\(x=\dfrac{30}{11}\)
#YVA
