Question

Resolva as equações que apresenta parêntese:

a) 3(x+2)+5=x+12

b)x+4(x-1)=9-2(x+3)

c)5x-(x-2)=2-3(x+5)

d)10-(2x+1)=4(2x+3)

e)5(3x-2)=2(6x+3)

f)2(3x-1)+2(3-x)=8

Answer 1

Resolva as equações que apresenta parêntese:

a) 3(x+2)+5=x+12==>3x+6+5=x+12==> 3x-x=12-11 ==> 2x=1==> x = 1/2

b)x+4(x-1)=9-2(x+3)=>x+4x-4=9-2x+6==>5x+2x=15+4==>7x=19==>x=19/7

c)5x-(x-2)=2-3(x+5)=> 5x-x+2=2-3x-15=>4x+3x=-13-2=>7x=-15=>x=-15/7

d)10-(2x+1)=4(2x+3)=>10-2x-1=8x+12=>8x+2x=9-12=>10x=-3==> x= -3/10

e)5(3x-2)=2(6x+3)=>15x-10=12x+6=>15x-12x=+6+10=>3x=16=>x=16/3

f)2(3x-1)+2(3-x)=8=>6x-2+6-2x=8=>4x=8-4=>4x=4=> x= 4/48 ==> x=1