Respuesta :

nonsibi

1. 18 = 3/4(y+8)-3

18 = 3/4y+6-3

18 = 3/4y+3

3/4y = 15

y = 20

2. 1/2(x+4)+1/2(x+4)=8 ---> (1/2+1/2)(x+4)=8 (quick trick :))

(1)(x+4)=8

x+4=8

x=4

3. 1/2(2x+6)+x=1

x+3+x=1

2x+3=1

2x=-2

x=-1

Otras preguntas