sandrinhakarolyne
Respondido

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??   ;(

Resposta :

samaramara44
)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
silvania012
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!

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