Tìm x:
X-17/4 = 5/7
3/5+x=11/3-6/5
Giải hết ra giúp tôy vs
Ai đúng tôy tick nhak👉🏻👈🏻
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a] 23/16
c)7/45
d)1/2
b)83/48
Đúng nhé mình làm tong toán nâng cao lớp 5 rồi
a)x*4/5:2=6/7 b)6/5:x:5/4=10/15
x*4/5=6/7 x 2 6/5:x=10/15 x 5/4
x*4/5=12/7 6/5:x=5/6
x=12/7:4/5 x=6/5:5/6
x=15/7 x=36/25
a) x * 4/5 : 2 = 6/7
x * 4/5 = 6/7 *2
x *4/5 = 12/7
x = 12/7 : 4/5
x = 15/7
Vậy x = 15/7
5.\(-\dfrac{3}{7}+\dfrac{5}{13}+\dfrac{-4}{12}=-\dfrac{103}{273}\)
b.\(-\dfrac{5}{21}+\dfrac{-2}{21}+\dfrac{8}{24}=\dfrac{-5-2}{21}+\dfrac{8}{24}=-\dfrac{7}{21}+\dfrac{8}{24}=-\dfrac{1}{3}+\dfrac{8}{24}=0\)
c.\(\dfrac{5}{13}+\dfrac{-5}{7}+\dfrac{-20}{41}+\dfrac{8}{13}+\dfrac{-21}{41}=\left(\dfrac{5}{13}+\dfrac{8}{13}\right)+\left(\dfrac{-20}{41}+\dfrac{-21}{41}\right)+-\dfrac{5}{7}=1-1-\dfrac{5}{7}=-\dfrac{5}{7}\)
Bài 1:
\(=\dfrac{-3-39}{42}+\dfrac{-6-11}{17}-\dfrac{1}{6}=-\dfrac{119}{48}\)
Bài 2:
=>x:5=-13/20
hay x=-65/20=-13/4
= 28/15 . 3/4 - ( 11/20 + 1/4 ) : 7/3
= 28/15 . 3/4 - 4/5 : 7/3
= 7/5 - 12/35
= 37/35
= \(\dfrac{28}{15}\) . \(\dfrac{3}{4}\) - (\(\dfrac{11}{20}\) + \(\dfrac{1}{4}\)) : \(\dfrac{7}{3}\)
= \(\dfrac{7}{5}\) - (\(\dfrac{11}{20}\) + \(\dfrac{5}{20}\)) : \(\dfrac{7}{3}\)
= \(\dfrac{7}{5}\) - \(\dfrac{16}{20}\) : \(\dfrac{7}{3}\)
= \(\dfrac{7}{5}\) - \(\dfrac{16}{20}\) x \(\dfrac{3}{7}\)
= \(\dfrac{7}{5}\) - \(\dfrac{12}{35}\)
= \(\dfrac{49}{35}\) - \(\dfrac{12}{35}\)
= \(\dfrac{37}{35}\)
Đáy bé là : \(\dfrac{140\times1}{2}=70\left(m\right)\)
Chiều cao là : \(70+30=100\left(m\right)\\
a,S:\dfrac{\left(140+70\right)\times100}{2}=14000\left(m^2\right)\)
b, Thửa ruộng thu dc : \(62\times\left(14000:100\right)=8680\left(kg\right)\)
Bài 1:
\(=\dfrac{-3-39}{32}+\dfrac{-6-11}{17}+\dfrac{-1}{6}=-\dfrac{21}{16}+\dfrac{-1}{6}-1=-\dfrac{119}{48}\)
Bài 2:
\(\Leftrightarrow x:5=-\dfrac{13}{20}\)
hay x=-13/4
x - \(\frac{17}{4}\) = \(\frac{5}{7}\)
x = \(\frac{5}{7}\) +\(\frac{17}{4}\)
x = \(\frac{20}{28}\) + \(\frac{119}{28}\)
x = \(\frac{139}{28}\)
Vậy x = \(\frac{139}{28}\)
\(\frac{3}{5}\) + x = \(\frac{11}{3}\) - \(\frac{6}{5}\)
\(\frac{3}{5}\) + x = \(\frac{37}{15}\)
x = \(\frac{37}{15}\) + \(\frac{3}{5}\)
x = \(\frac{31}{15}\)
Vậy x = \(\frac{31}{15}\)
3/5+x=55/15-18/15
x= 5/7 + 17/4 => 3/5+x=37/15
=>x=20/28+199/28 =>x=37/15-3/5
=> x= 139/28 =>x=37/15-9/15
vậy x= 139/28 =>x=28/15
vậy x=28/15
cho mik mha chúc bạn học tốt