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TruX
@TruX
December 2019
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2- Resolva com atenção cada uma das equações:
a) 2x+6 = x+18
b) 5x-3 = 2x+9
c) 3(2x-3)+2(x+1) = 3x+18
d) 2x+3(x-5) = 4x+9
e) 2(x+1)-3(2x-5) = 6x-3
f) 3x-5 = 13
g) 3x+5 = 2
h) 3x-5 = x-2
i) x-(2x-1) = 23
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popeye1
A)
2x+6= x+18
x= 12
___________________________
b)
5x-3= 2x+9
3x= 12
x= 12/3
x= 4
___________________________
c)
3(2x-3)+2(x+1)= 3x+18
6x-9+2x+2= 3x+18
8x-7-3x= 18
5x= 25
x= 25/5
x= 5
___________________________
d)
2x+3(x-5) = 4x+9
2x+3x-15= 4x+9
5x-4x= 24
x= 24
___________________________
e)
2(x+1)-3(2x-5) = 6x-3
2x+2-6x+15= 6x-3
-4x-6x= -3-17 (-1)
10x= 20
x= 20/10
x= 1
_________________________
f)
3x-5= 13
3x= 13+5
x= 18/3
x= 6
_________________________
g)
3x+5= 2
3x= 2-5
3x= -3
x= -1
__________________________
h)
3x-5 = x-2
3x-x= -2+5
2x= 3
x= 3/2
__________________________
i)
x-(2x-1) = 23
x-2x+1= 23
-x= 22
x= -22
__________________________
Forte abraço!
2 votes
Thanks 1
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Lista de comentários
2x+6= x+18
x= 12
___________________________
b)
5x-3= 2x+9
3x= 12
x= 12/3
x= 4
___________________________
c)
3(2x-3)+2(x+1)= 3x+18
6x-9+2x+2= 3x+18
8x-7-3x= 18
5x= 25
x= 25/5
x= 5
___________________________
d)
2x+3(x-5) = 4x+9
2x+3x-15= 4x+9
5x-4x= 24
x= 24
___________________________
e)
2(x+1)-3(2x-5) = 6x-3
2x+2-6x+15= 6x-3
-4x-6x= -3-17 (-1)
10x= 20
x= 20/10
x= 1
_________________________
f)
3x-5= 13
3x= 13+5
x= 18/3
x= 6
_________________________
g)
3x+5= 2
3x= 2-5
3x= -3
x= -1
__________________________
h)
3x-5 = x-2
3x-x= -2+5
2x= 3
x= 3/2
__________________________
i)
x-(2x-1) = 23
x-2x+1= 23
-x= 22
x= -22
__________________________
Forte abraço!