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a, x + 3/7 = 2/5 - 3/10
x + 3/7 = 1/10
x = 1/10 + 3/7
x = 37/70
b, 20/19 - x = 8/5 - 3/4
20/19 - x = 17/20
x = 77/380
các bạn k cho mình nha bao giờ trên 11 điểm mình sẽ k lại cho các bạn
a/\(\dfrac{19}{20}-y=\dfrac{8}{5}-\dfrac{3}{4}\)
\(\dfrac{19}{20}-y=\dfrac{17}{20}\)
\(y=\dfrac{19}{20}-\dfrac{17}{20}\)
\(y=\dfrac{2}{20}=\dfrac{1}{10}\)
b/\(y:\dfrac{2}{3}=\dfrac{4}{9}\times3\)
\(y:\dfrac{2}{3}=\dfrac{4}{3}\)
\(y=\dfrac{4}{3}\times\dfrac{2}{3}\)
\(y=\dfrac{8}{9}\)
#データネ
a) 19/20 - y = 8/5 - 3/4
19/20 - y = 17/20
y = 17/20 + 19/20
y = 36/20
b) y : 2/3 = 4/9 x 3
y : 2/3 = 12/9
y = 12/9 x 2/3
y = 24/27
tích cho mik nhaaaaaaaaaaa
a)
x + 2/5 = 1/2
x = 1/2 - 2/5
x = 1/10
b)
x + 3/7 = 2/5 + 3/10
x + 3/7 = 7/10
x = 7/10 - 3/7
x = 19/70
c)
19/20 - x = 8/5 - 3/4
19/20 - x = 17/20
x = 19/20 - 17/20
x = 1/5
a) x + 2/5 = 1/2
x = 1/2 - 2/5
x = 3/10
b) x + 3/7 = 2/5 + 3/10
x + 3/7 = 7/10
x = 7/10 - 3/7
x = 19/70
c) 19/20 - x = 8/5 - 3/4
19/20 - x = 17/20
x = 19/20 - 17/20
x = 2/20 = 1/10
\(x:\dfrac{8}{5}=\dfrac{19}{20}-\dfrac{3}{4}\)
\(x:\dfrac{8}{5}=\dfrac{1}{5}\)
\(x=\dfrac{1}{5}.\dfrac{8}{5}=\dfrac{8}{25}\)
\(\frac{19}{20}-x+\frac{3}{4}=\frac{8}{5}\)
\(\frac{19}{20}-x=\frac{8}{5}-\frac{3}{4}\)
\(\frac{19}{20}-x=\frac{17}{20}\)
\(x=\frac{19}{20}-\frac{17}{20}\)
\(x=\frac{1}{10}\)
\(\frac{19}{20}-x+\frac{3}{4}=\frac{8}{5}\)
\(1,7-x=1,6\)
\(x=1,7-1,6\)
\(x=0,1\)
\(\dfrac{19}{20}-x=\dfrac{8}{5}+\dfrac{3}{4}\)
\(\dfrac{19}{20}-x=\dfrac{32}{20}+\dfrac{15}{20}\)
\(\dfrac{19}{20}-x=\dfrac{47}{20}\)
\(x=\dfrac{19}{20}-\dfrac{47}{20}\)
\(x=\dfrac{-28}{20}=\dfrac{-7}{5}\)
#DatNe |
x = 1/10
19/20 - x = 17/20
x = 19/20 - 17/20
x = 2/20
x = 1/10