Question

3)
Resolva as equações:
a)4(x +8) = 40
b)- (x + 10) = - 2x - 60
c)3.(x - 1) - 2.(x + 3) + 5.(2-x) = -7
d)3.(2 - 4).(x - 1) – 3) +2.(x - 1) =0​

Answer 1

Resposta:

a)4(x+8)=40

4x+32=40

4x=40-32

4x=8

x=8/4

x=2

b)-(x+10)= -2x-60

-x-10= -2x-60

-x+2x= -60+10

x= -50

c)3.(x-1) - 2.(x+3)+5.(2-x)= -7

3x-3 - 2x+6 + 5=-7

x+3+5= -7

x+8= -7

x= -7 -8

x= -15

d)3.(2-4).(x-1)-3)+2.(x-1)=0

6-12 . -3x+1 + 2x-2=0

-6 . -x-1=0

6x+6=0

6x = -6

x= -6/6

x=-1