Anjos me ajudem !

1) Resolva as Equações

a) 2x+5=3x-10 =

b) 10x-20=5x+10 =

c) 15(x+2) = 0

d) 5 (10-y)= 0

e) 3y+4y=100-30 =

f) 8a+44=160-44 =

g) 5x-100=10x+100 =

h) 5(15+3)+x=-x+5(15+3) =

i) y+5=3(y-5) =

J) 2(-x+1)= 0

k ) 3(5-y)= -4(y+10) =

Me ajudem por favor , montem a conta pra mim gente me ajudem por favor e urgente e trabalho de recuperação ! QUE DEUS OS ABEÇOE , AMÉM ♥

1

Respostas

A melhor resposta!
2014-05-10T14:29:48-03:00
A)
2x+5=3x-10
2x-3x=-10-5
-x=-15
 x = 15
______________________
b)
10x-20=5x+10
10x-5x=10+20
5x=30
 x =30/ 5
 x = 6
______________________
c)
15(x+2) = 0
15x+30 = 0
15x= -30
   x= -30 / 15
   x= -2
______________________
d)
5(10 - y) = 0
50-5y=0
-5y=-50
  y=-50 /-5
  y=10
______________________
e)
3y+4y = 100-30
7y=70
 y=70 / 7
 y=10
______________________
f)
8a+44=160-44
8a=160-44-44
8a=160-88
8a=72
 a= 72 / 8
 a=9
______________________
g)
5x-100=10x+100
5x-10x=100+100
-5x=200
   x=200 / -5
   x=-40
_____________________
h)
5(15+3)+x=-x+5(15+3)
75+15+x=-x+75+15
90+x=-x+90
x+x=90-90
2x=0
x=0 / 2
x=0
_____________________
i)
y+5=3(y-5)
y+5=3y-15
y-3y=-15-5
-2y=-20
y=-20/-2
y=10
_____________________
j)
2(-x+1)=0
-2x+2=0
-2x=-2
x=-2/-2
x=1
_____________________
k)
3(5-y)=-4(y+10)
15-3y=-4y-40
-3y+4y=-40-15
y=-55
_____________________


1 5 1