Question

Resolva as expressões:

a) [(4x7)+12]:(3x5+5)=



b) 15+[(3x6-2)-(10-6:2)+1=



c) 50- {40-3x[5-(10+7)]}

Obs: o simbolo ( : ) significa dividir, e quero a conta armada :')

Answer 1

a) 
4x7= 28+12= 40
3x5=15+5= 20
28+12: 20 
40:20
   2

b)
3x6=18-2= 16
6;2= 3-10= -7
15+[16- 7] +1
 15+ 9+1
     25

c)
50 - {40-3 x[5-17]}
 50 - {40 -3 x12}
  50 - {40 - 36}
    50 - 4
      46

Answer 2

1- se resolve ( )
2- se resolve [ ]
3- se resolve { }
a) [(4x7)+12]:(3x5+5)=
[28+12]:20=
40:20= 2

b) 15+[(3x6-2)-(10-6:2)+1=
15+[16-2]+1=
15+14+1= 30

c) 50-{40-3x[5-(10+7)]}=
50-{40-3x[5-17]}
50-{40-3x12}
50-4= 46

Espero ter Ajudado!