Question

coroana + 38 de puncte+multumesc+5 stele
1)-23+{-137+[245-(103-57)-2*(-3)*(-4)]}
2)x pe 12=2 langa 1 pe 3
gata va multumesc foarte mult
si cat mai repede rezolvate

Answer 1

1)
-23+{-137+[245-(103-57)-2×(-3)×(-4)]} =

= -23+{-137+[245-46+6×(-4)]} =

= -23+[-137+(245-46-24)] =

= -23+(-137+175) =

= -23+38 =

= 15

2)
x/12 = 2 1/3
x/12 = (2×3+1)/3
x/12 = 7/3
x = 7×12/3
x = 84/3
x = 28

Answer 2

1) -23+{-137+[245-(103-57)-2·(-3)·(-4)]} =
-23 +{-137+[245-46-2·12]} =
-23+{-137 +[ 245-46-24]}=
-23+{-137 +175}=
-23+48 =15
2) X/12= 2  1/3
     X/12= 7/3
    X =(12·7)/3
     X = 4·7
     X = 28