Question

[Ngothitolan]

Tìm x

491 - ( x + 83) = 336 

( 517 - x ) +  131 = 631 

Answer 1

[Thám Tử THCS Nguyễn Hiếu]

a)491 - ( x + 83) = 336 

(x+83)=491-336

(x+83)=155

x=155-83

x=72

b)( 517 - x ) +  131 = 631 

( 517 - x ) =631-131

( 517 - x ) =500

x=517-500

x=17