NHỜ CÁC CHUYÊN GIA GIẢI GIÚP EM BÀI NÀY VỚI Ạ 4/9 x [ 7/2 – 1 1/4 ] – 3/4 x X = 1/2 14/09/2021 Bởi Hadley NHỜ CÁC CHUYÊN GIA GIẢI GIÚP EM BÀI NÀY VỚI Ạ 4/9 x [ 7/2 – 1 1/4 ] – 3/4 x X = 1/2
$\dfrac{4}{9}\times (\dfrac{7}{2}-1\dfrac{1}{4})-\frac{3}{4}\times x = \dfrac{1}{2}$ $\dfrac{4}{9}\times (\dfrac{7}{2}-\dfrac{5}{4}) -\dfrac{3}{4}\times x=\dfrac{1}{2}$ $\dfrac{4}{9}\times (\dfrac{14}{4}-\dfrac{5}{4})-\dfrac{3}{4}\times x =\dfrac{1}{2}$ $\dfrac{4}{9}\times \dfrac{9}{4}-\dfrac{3}{4}\times x =\dfrac{1}{2}$ $1-\dfrac{3}{4}\times x =\dfrac{1}{2}$ $\dfrac{3}{4}\times x = 1-\dfrac{1}{2}$ $\dfrac{3}{4}\times x=\dfrac{1}{2}$ $x=\dfrac{1}{2}:\dfrac{3}{4}$ $x=\dfrac{2}{3}$ Bình luận
`4/9 × ( 7/2 – 1 1/4 ) – 3/4 × x = 1/2` `4/9 × ( 7/2 – 5/4 ) – 3/4 × x = 1/2` `4/9 × ( 14/4 – 5/4 ) – 3/4 × x = 1/2` `4/9 × 9/4 – 3/4 × x = 1/2` `( 4/9 × 9/4 ) – 3/4 × x = 1/2` `1 – 3/4 × x = 1/2` `3/4 × x = 1/2` `x = 1/2 : 3/4` `x = 1/2 × 4/3` `x = 2/3` HỌC TỐT NHA ! #Sâu Bình luận
$\dfrac{4}{9}\times (\dfrac{7}{2}-1\dfrac{1}{4})-\frac{3}{4}\times x = \dfrac{1}{2}$
$\dfrac{4}{9}\times (\dfrac{7}{2}-\dfrac{5}{4}) -\dfrac{3}{4}\times x=\dfrac{1}{2}$
$\dfrac{4}{9}\times (\dfrac{14}{4}-\dfrac{5}{4})-\dfrac{3}{4}\times x =\dfrac{1}{2}$
$\dfrac{4}{9}\times \dfrac{9}{4}-\dfrac{3}{4}\times x =\dfrac{1}{2}$
$1-\dfrac{3}{4}\times x =\dfrac{1}{2}$
$\dfrac{3}{4}\times x = 1-\dfrac{1}{2}$
$\dfrac{3}{4}\times x=\dfrac{1}{2}$
$x=\dfrac{1}{2}:\dfrac{3}{4}$
$x=\dfrac{2}{3}$
`4/9 × ( 7/2 – 1 1/4 ) – 3/4 × x = 1/2`
`4/9 × ( 7/2 – 5/4 ) – 3/4 × x = 1/2`
`4/9 × ( 14/4 – 5/4 ) – 3/4 × x = 1/2`
`4/9 × 9/4 – 3/4 × x = 1/2`
`( 4/9 × 9/4 ) – 3/4 × x = 1/2`
`1 – 3/4 × x = 1/2`
`3/4 × x = 1/2`
`x = 1/2 : 3/4`
`x = 1/2 × 4/3`
`x = 2/3`
HỌC TỐT NHA !
#Sâu