Question

Tìm y

( 13 x 7 + 13 x 8 ) : ( 29/3 - y ) = 39

Lam nhanh mình tick cho ( Cả cách giải nhé )

 

Answer 1

(13x7+13x8):(29/3-y)=39

=>[13x(7+8)]:(29/3-y)=39

=>(13x15):(29/3-y)=39

=>195:(29/3-y)=39

=>29/3-y=195:39=5

=>y=29/3-5

=>y=29/3-15/3

=>y=13/3

Answer 2

(13 x 7 + 13 x 8) : (29/3 - y) = 39

=> [13 x (7 + 8)] : (29/3 - y) = 39

=> (13 x 15) : (29/3 - y) = 39

=>195 : (29/3 - y) = 39

=> 29/3 - y = 195 : 39 = 5

=> y = 29/3 - 5

=> y = 29/3 - 15/3

=> y = 13/3

Answer 3

Ta có:(13.7+13.8) : (29/3-y)=39

       [ 13.(7+8) ] : (29/3-y)=39

               13.15 : (29/3-y)=39

                            29/3-y=5

                                   y=14/3