## 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

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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

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3 tháng 2021-09-14T08:21:03+00:00 2 Answers 7 views 0

1. $\dfrac{4}{9}\times (\dfrac{7}{2}-1\dfrac{1}{4})-\frac{3}{4}\times x = \dfrac{1}{2}$

$\dfrac{4}{9}\times (\dfrac{7}{2}-\dfrac{5}{4}) -\dfrac{3}{4}\times x=\dfrac{1}{2}$

$\dfrac{4}{9}\times (\dfrac{14}{4}-\dfrac{5}{4})-\dfrac{3}{4}\times x =\dfrac{1}{2}$

$\dfrac{4}{9}\times \dfrac{9}{4}-\dfrac{3}{4}\times x =\dfrac{1}{2}$

$1-\dfrac{3}{4}\times x =\dfrac{1}{2}$

$\dfrac{3}{4}\times x = 1-\dfrac{1}{2}$

$\dfrac{3}{4}\times x=\dfrac{1}{2}$

$x=\dfrac{1}{2}:\dfrac{3}{4}$

$x=\dfrac{2}{3}$

2. 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