Question

Afla necunoscuta: a : a + 3a - 2a = 5 ;

a x 0 + 2a : 1 - a + 3a =8 ;

48 : 4 + {12 +[60 : 5 - (12 : a + 5 ) : 3 ] :5} : 7 = 14 Multumesc mult!

Answer 1

Explicație pas cu pas:

Afla necunoscuta:

a : a + 3a - 2a = 5

1+a = 5

a= 5-1 = 4

a x 0 + 2a : 1 - a + 3a =8

0+2a-a+3a = 8

4a= 8

a= 8:4 = 2

48 : 4 + {12 +[60 : 5 - (12 : a + 5 ) : 3 ] :5} : 7 = 14

12 + {12+[12-(12:a+5):3]:5}:7 = 14

{12+[12-(12:a+5):3]:5}:7 = 14-12 = 2

12+[12-(12:a+5):3]:5 = 2× 7= 14

[12-(12:a+5):3]:5 = 14-12 = 2

12-(12:a+5):3 = 2×5 = 10

(12:a+5):3 = 12-10 = 2

12:a+5 = 2×3 = 6

12:a = 6-5 = 1

a= 12: 1 = 12