Question

[trần thị ánh ly]

a,y -6÷2-(48-24×2÷6-3) =0

B.(7×13+8×13)÷(9 2/3 -y ) =39

Answer 1

[Nguyễn Mỹ Bình]

a) y - 6 chia 2 - ( 48 - 24 x 2 chia 6 - 3 ) = 0

=> y - 6 chia 2 - ( 48 - 48 chia 6 - 3 ) = 0 

=> y - 6 chia 2 - (  48 - 8 -3 ) = 0

= > y - 6 chia 2 - 37 = 0

=> y - 6 chia 2 = 0 + 37 

=> y - 6 chia 2 = 37

=> y -6 = 37 chia 2 

=> y - 6 = 37 / 2

=> y = 37 / 2    +  6

=> y = 49 / 2

Vậy y = 49 / 2

b) ( 7 x 13 + 8 x 13 ) chia ( 92 /3-y ) = 39

=> ( 91  +   104 ) chia ( 92/3 - y ) =39

=> 195 chia  ( 92 /3 - y ) = 39

=> 92/3 - y = 7605 

=>           y = 7605 + 92/3 

=>           y = 22907 /3

Vậy y = 22907 / 3