Respostas

2014-08-26T17:14:06-03:00
Hola !!!!!!!!!!!!!!!!!!
 a) 2x+8=54, 2x = 54-8 , --------> x =46/2 = 23

b)2x=18-2; 2x=16----------------->x=16/2=8

c)-3x = 11+4 -----------> -3x= 15 =---------> x= -5

2 5 2