Ta có :
\(9,15xX+2,85xX=48\)
\(Xx\left(9,15+2,85\right)=48\)
\(Xx12=48\)
\(X=48:12\)
\(X=4\)
9,15x + 2,85x = 48
(9,15 + 2,85)x = 48
12x = 48
x = 4
9,15\(\times\)x + 2,85\(\times\)x = 48
(9,15 + 2,85)\(\times\)x =48
12\(\times\)x =48
x =48\(\div\)12
x =4
9,15 . X + 2,85 . X = 48
= ( 9,15 + 2,85 ) . X = 48
= 12 .X = 48
= X = 48 : 12
= > X = 4
~ ủng hộ mk nha ~
(X -12) x 17 : 11 = 51