Respostas

2014-08-29T18:46:05-03:00
A)4x-8=3x-5  
4x-3x=8-5 
x=3 
 
Já vou sair
4 3 4
2014-08-29T20:14:13-03:00
A) 4x+8=3x-5
4x-3x= -8-5
X=-13
B)4(2x-1)=3(5x-2)-5
8x-4=15x-6-5
8x-15x=-11+4
-7x=-7 (-1)
7x=7
X=7/7
X=1

C) 3a-4=a+1
3a-a=1+4
2a=5
a=5/2

D) 2x+3(x-5)=4x+9
2x+3x-15=4x+9
5x-15=4x+9
5x-4x=15+9
X=24

E)9y-11=-2
9y=11-2
Y=9/9
Y=1

F) 2(x+1)-3(2x-5)=6x-3
2x+2-6x+15=6x-3
-4x-6x=-3+2-15
-10x=-16 (-1)
10x=16
X=16/10
X=4/5

G)5x-1=8x+5
5x-8x=5+1
-3x=6 (-1)
3x=-6
X=-6/3
X=-2

H) 9x+9-7x+21=33
-2x=33-21-9
-2x=3 (-1)
X= 3/2

I) 7x-5x=6+4
12x=10
X=10/12
X=5/6

J)mmc 3,4,6| 2
3,2,3 | 2
3,1,3 | 3
1,1,1
Mmc=12

12x-8+12x+6=2+12x
-12x=2-6+8
-12x=+4 (-1)
12x=-4
X=4/12
X=1/3

4 2 4