Question

Calculeaza ,ajutor,please.....

(a:5-2): 3 - 18 :6 = 2 [10+3 x (a - 15 :5 ) ] : 4 = 10

Answer 1

(a:5-2): 3 - 18 :6 = 2
(a:5-2): 3 - 3 = 2
(a:5-2): 3  = 2+3
(a:5-2): 3  = 5
a:5-2  = 5*3
a:5  = 15+2 
a  = 17 *5
a=85

[10+3 x (a - 15 :5 ) ] : 4 = 10
10+3 x (a - 3 )   = 10*4
3 x (a - 3 )   = 40-10
3 x (a - 3 )   = 30
a-3=30:3
a-3=10
a=10+3
a=13