Question

Tìm x :

a) [ ( x + 32 ) - 17 ] * 2 = 42

b) [ 61 + ( 53 - x ) ] * 17 = 1785

c) 697 : 15x + 364 / x = 17

d) 92 * 4 - 27 = x + 350 / x + 315

Answer 1

[(x + 32) - 17] . 2 = 42

(x + 32) - 17 = 42 : 2

(x + 32) - 17 = 21

x + 32 = 21 + 17 

x + 32 = 38

x = 38 - 32

x = 6

Vậy x = 6

Answer 2

a) [ (x + 32 ) - 17 ] * 2 = 42

[ (x + 32 ) - 17 ] = 42 : 2

 (x + 32 ) - 17  = 21

 (x + 32 )  = 21 + 17 

 x + 32     = 38

x = 38 - 32

x = 6