\(\dfrac{x}{7}=\dfrac{20}{35}\)
\(\Rightarrow\dfrac{x}{7}=\dfrac{4}{7}\)
\(\Rightarrow x=4\)
\(\dfrac{x}{7}=\dfrac{20}{35}\)
\(\Rightarrow\dfrac{x}{7}=\dfrac{4}{7}\)
\(\Rightarrow x=4\)
Bài 1:Tìm x biết
a, 3/x = 4/-12
b,5/7 = x/35
c,-10/3 = 20/x
d,x+4/x-2 = 5/7
Tìm x
| x+4 | +6x =13
|x-5|+|x+8 =40
|x+7|+|x+20|+|x+90|=x-35
Tìm nghiệm nguyên của phương trình
(x7-1)/(x-1)=y5-1
Tìm x biết:
f,2/3*(1/2+3/4-1/3)<x/18<7/3*(1/2-1/6) với x thuộc Z
g,(31/20-26/45)*-36/35<x<(51/56+8/21+1/3)*8/13 với x thuộc Z
Tìm x:
\(\frac{x+3}{20}+\frac{x-15}{21}+\frac{x-35}{22}=6\)
Giúp mình nha!
Tìm x biết:
a) 3/35 - (3/5 + x) = 2/7
b) 3/7 +1/7 : x = 3/14
c) (5x-1).(2x-1/3)=0
Tìm \(x\)
a) \(\dfrac{2-x}{4}=\dfrac{3x-1}{3}\)
b) \(\dfrac{x}{7}=\dfrac{x+16}{35}\)
c) \(\sqrt{x^2+1}=3\)
bài 5:tìm x biết
a)400-5x=200 b)250:x+10=20
c)96-3(x+8)=42 d)36:(x-5)=2^2
e)15.5(x-35)-525=0 f)[3.(70-x)+5]:2=46
giúp mình vs
Tìm x, biết:
a) \(\dfrac{3}{7}\)x - \(\dfrac{2}{3}\)x = \(\dfrac{10}{21}\)
b) \(\dfrac{7}{35}\) : (x - \(\dfrac{1}{3}\)) = \(-\dfrac{2}{25}\)
c) 3.(x - \(\dfrac{1}{2}\)) - 5. (x + \(\dfrac{3}{5}\)) = -x + \(\dfrac{1}{5}\)