Question

Tìm X:

a) ( X - 21 x 13 ) : 11 =30

 

b) (627 - 138 ) : ( x : 2 ) = 163

 

c) ( \(\frac{1}{2}\)+ X x \(\frac{9}{7}\)) : 2 ) = 163

 

d) ( 1 - \(\frac{3}{10}\)- X ) : (\(\frac{19}{10}\)- 1 - \(\frac{2}{5}\))  + \(\frac{4}{5}\)= 1

 

Ai lm nhanh mk cho 3 tik,5 phút sau lấy.

Answer 1

(x - 21 x 13) : 11 = 30

=> x - 273 = 330

=> x = 603

vậy_

(627 - 138) : (x : 2) = 163

=> 489 : (x : 2) = 163

=> x : 2 = 3

=> x = 6

vậy_

Answer 2

\(\left(x-21.13\right):11=30\)

\(\left(x-273\right):11=30\)

\(\left(x-273\right)=30.11=330\)

\(x=330+273\)

\(x=603\)