Preciso saber qual a soma dessas equaçoes...
Por favor me ajudem.....

a)3x -10 +13= -2x +28??
b)20x -30=40+30 -20??
c) -5x+45 -89 = -90+41??
d) 10x-20=40+50??
e)20-80+2x=10??
f)19+2x-13=10-20??

Preciso saber de todas... voces me ajudam?? ;(


2
essa 30-20............. eu ja sei a conta e o resultado eu quero a partir do 3x-10.............
iria dar quinze
nn iria dar 0 pois 30-20+2x=10 10+2x=10 x=0
eu quero essas....
3x-10+13=-2x+28?
1
4
6
7
5
20x-30=40+30-20?
53
78
90
4
19
-5x+45-89=-90+41?
3
2
6
1
8
10x-20=40+50?
12
11
10
9
3
20-80+2x=10?
25
95
15
45
35
19+2x-13=10-20?
9
-8
-3
-1
7

Respostas

2013-12-05T09:47:18-02:00
)3x -10 +13= -2x +28=45
b)20x -30=40+30 -20=233
c) -5x+45 -89 = -90+41
d) 10x-20+40+50=90
e)20-80+2x=10=134
f)19+2x-13+10-20=65
1 1 1
2013-12-05T10:10:00-02:00
A)3x-10+13=-2x+28   b)20x-30=40+30-20  c)-5x+45-89=-90+41  d)10x-20=40+50
3x+2x=10-13+28       20x=30+40+30-20        -5x=-45+89-90+41      10x=20+40+50
5x=38-13                   20x=100-20                   -5x=-45-90+89+41      10x=110
5x=25                          20x=80                         -5x=-130+130(-1)          x=110/10
x=25/5                         x=80/20                         5x=130-130                  x=11
x=5                              x=4                                    5x=0
 
e)20-80+2x=10
   2x=-20+80+10                      f)19+2x-13=10-20
  2x=-20+90                                2x=-19+13+10-20
  2x=70                                        2x=-19-20+13+10
x=70/2                                          2x=-39+23
x=35                                              2x=-16
                                                         x=-16/2                                  
                                                        x=-8
Espero tê-la ajudado!

Nossa ajudou bastante........
Muito obrigada mesmo Silvania ;)
Por nada,que bom!!!