Question

prf vale 5 pontos !

Resolva as equações , dizendo a que conjunto pertence ;


a) 4(x+5)=7(x+4)

b) (6x12=2x-16

c) 2(x-3)=4(x+8)

d) 3x.

------ = 6

4


E) 5x=30

f) 8x+9=0

Answer 1

a) 4(x+5)=7(x+4)
4x+20=7x+28
-4x+7x=-28+20
3x=-8 >> x= -8/3

c) 2(x-3)=4(x+8)
2x-6= 4x+32
4x-2x= -32-6
2x=-36
x=-18

E) 5x=30
x=30/5
x=6

f) 8x+9=0
x=9/8