Question

Gente me ajudem a responder por favor!!! Equação de primeiro grau!!! A) 8x4= -2(x-4]+6, B)5x+2x+6=2.(12-x)+x, C)6x+12=3(+2x-6x+4)+6 E)2x-6=-4.(x-16) F)6x+4=+2.(x-4x+6)+4 G)7.(2x-4)+6.(4-6x) H)2.(4x-6)+4=12x+3-2(-1+2x)!!!! valendo 15 pontos

Answer 1

Olá,

Vamos lá,
A) 8x4= -2(x-4]+6
32 = - 2x +8 +6

2x = 8 +6 -32

2x = -18

x = -18/2

x = - 9

B)5x+2x+6=2.(12-x)+x,

5x +2x +6 = 24 -2x +x

5x + 2x +2x - x = 24

8x = 24

x = 24/8

x = 3

C)6x+12=3(+2x-6x+4)+6
6x + 12 = 6x -18x +12 +6

6x - 6x +18x = 12 +6 -12

18x = 6

x = 6/18

x = 1/3


E)2x-6=-4.(x-16)
2x - 6 = -4x + 64

2x +4x = 64 +6

6x = 70

x = 70/6

x = 11,67


F)6x+4=+2.(x-4x+6)+4
6x +4 = 2x - 8x +12 +4

6x -2x +8x = 12 +4 -4

12x = 12

x = 12/12

x = 1

G)7.(2x-4)+6.(4-6x)
14x - 28 + 24 - 36x

22x -4


 H)2.(4x-6)+4=12x+3-2(-1+2x)
8x - 12 +4 = 12x + 3 + 2 - 4x
8x -12x +4x = 3 +2 +12 - 4
0 x = 13
não existe

Answer 2

A) 8x4= -2(x-4]+6==>8x+ 4= -2x+8+6 8x+2x = 14-4==>10x=10==>x = 1=========================================================
B)5x+2x+6=2.(12-x)+x ==> 7x+6=24-2x+x7x+2x-x=24-6==>  8x = 18 ==>x=8/18
==================================================
C)6x+12=3(+2x-6x+4)+6 ==>6x+12=6x-18x+12+6

6x-6x+18x =+12+6-12 ==> 18x=6==>x = 6/18
======================================================

E )2x-6=-4.(x-16) ==> 2x-6= -4x + 64

2x+4x = 64+6 ==>6x = 70==> x= 70/6
===================================================
F)6x+4=+2.(x-4x+6)+4

6x+4=2x-8x+12+4 ==> 6x-2x+8x=12+4-4

12x=12 ==> x = 1
======================================================
G)7.(2x-4)=6.(4-6x)

14x-28 = 24 - 36x ==> 14x+36x= 24+28==> 50x= 52==>x = 52/50
======================================================
H)2.(4x-6)+4=12x+3-2(-1+2x)

8x-12+4 = 12x+3+2-4x ==> -12x+8x+4x=12-4+2

0x = 10 ==> x = 10   indeterminado.
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