Question

Equações variável x :
A) x- 8x +16=4
B) x+2x+1=81
C) x-10x+25=0
D) x-12x +36=-9
E) 4x-4x+1=9
F) 4x-36x+81=16

Answer 1

Olá

Vamos lá

A) x- 8x +16=4
x-8x=4-16
-7x=-12
x=-12/-7
x=12/7


B) x+2x+1=81
3x=81-1
3x=80
x=80/3


C) x-10x+25=0
-9x=-25
x=-25/-9
x=25/9

D) x-12x +36=-9
-11x=-9-36
-11x=-45
x=-45/-11
x=45/11

E) 4x-4x+1=9
0+1=9   não existe

F) 4x-36x+81=16
-32x=16-81
-32x=-65
x=65/32


Bons estudos, dúvidas só chamar !!! :>)) erico munayer

Answer 2

a)x-8x+16=4
-7x=4-16
-7x=-12×(-1)
7x=12
x=12/7
b)x+2x+1=81
3x=81'1
3x=80
x=80/3
x=2,66
c)x-10x+25=0
-9x=-25×(-1)
9x=25
x=25/9
x=2,77
d)x-12x+36=-9
-11x=-9-36
-11x=-45×(-1)
x=45/11
e)4x-4x+1=9
0x=9-1
0x=8
resposta zero
f)4x-36x+81=16
-32x=16-81
-32x=-65×(-1)
32x=65
x=65/32