Question

Resolva equações:
A) 4x=8
B)-5x=10
C)7+x=8
D)3-2x=-7
E)16+4x-4=x+12
F)8+7x-13=x-27-5x
G)2x/3=3/4
H)1/4=3x/10
I)9x+2-(4x+5)=4x+3
J)3.(2-x)-5.(7-2x)=10-4x+5
K)x-2/3-12-x/2=5x-36/4-1
L)5x+3/8-3-4x/3+x/2=31/2-9-5x/6

Answer 1

A) 4x=8

x=8/4

x=2    

B) -5x=10 (-1)

5x=-10

x=-10/5

x=-2

C) 7+x=8

x=8-7

x=1

D) 3-2x=-7

-2x=-7-3

-2x=-10 (-1)

2x=10

x=10/2

x=5

E) 16+4x-4=x+12

4x-x=12+4-16

3x=16-16

3x=0

x=0/3

x=0

F) 8+7x-13=x-27-5x

7x-x+5x=-27+13-8

11x=-35+13

11x=-22

x=-22/11

x=-2

G) 2x/3=3/4

4.(2x)=3.(3)

8x=9

x=9/8  

H) 1/4=3x/10

10(1)=4(3x)

12x=10

x=10/12

x=5/6

I) 9x+2-(4x+5)=4x+3

9x+2-4x-5=4x+3

9x-4x-4x=3+5-2

x=6

J) 3.(2-x)-5.(7-2x)=10-4x+5

6-3x-35+10x=10-4x+5

-3x+10x+4x=10+5-6+35

11x=44

x=44/11 

x=4

K) x-2/3-12-x/2=5x-36/4-1

(12x-8-144-6x)/12=(60x-108-12)/12

12x-6x-60x=-108-12+8+144

-54x=-120+152

-54x=32(-1)

54x=-32

x=-32/54

x=-16/27

L) 5x+3/8-3-4x/3+x/2=31/2-9-5x/6

(120x+9-72-32x+12x)/24=(372-216-9+72)/24

120x-32x+12x+20x=372-216-9+72

152x-32x=444-225

120x=219

x=219/120

x=73/40