(respondam com continha)
a)2x6=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=x-2
g)3x-5=13
h)3x+5=2
i)x-(2x-1)=23
Usuário anônimo:
na letra A? 2x + 6 ou 2x - 6?
Soluções para a tarefa
Respondido por
1
(respondam com continha)a)2x6=x+18 ( caso seja (POSITIVO) (+)
2x + 6 = x + 18
2x + 6 - x = 18
2x - x = 18 - 6
1x = 12
x = 12/1
x = 12
CASO seja ( NEGATIVO) (-)
2x - 6 = x + 18
2x - 6 - x = 18
2x - x = 18 + 6
1x = 24
x =24/1
x = 24
b)5x-3=2x+9
5x - 3 = 2x + 9
5x - 3 - 2x = 9
5x - 2x = 9 + 3
3x = 12
x = 12/3
x = 4
c)3(2x-3)+2(x+1)=3x+18
6x - 9 + 2x + 2 = 3x + 18
6x + 2x - 9 + 2 = 3x + 18
8x - 7 = 3x + 18
8x - 7 - 3x = 18
8x - 3x = 18 + 7
5x = 25
x = 25/5
x = 5
d)2x+3(x-5)=4x+9
2x + 3x - 15 = 4x + 9
5x - 15 = 4x + 9
5x - 15 - 4x = 9
5x - 4x = 9 + 15
1x = 24
x = 24/1
x = 24
e)2(x+1)-3(2x-5)=6x-3
2x + 2 - 6x + 15 = 6x - 3
2x - 6x + 2 + 15 = 6x - 3
- 4x + 17 = 6x - 3
- 4x - 6x = - 3 - 17
- 10x = - 20
x = - 20/-10
x = 20/10
x = 2
f)3x-5=x-2
3x - 5 - x =- 2
3x - x = -2 + 5
2x = 3
x = 3/2
g)3x-5=13
3x = 13 + 5
3x = 18
x = 18/3
x = 6
h)3x+5=2
3x = 2 - 5
3x = - 3
x = -3/3
x = - 1
i)x-(2x-1)=23
x - 2x + 1 = 23
- 1x + 1 = 23
- 1x = 23 - 1
- 1x = 22
x = 22/-1
x = - 22/1
x = - 22
2x + 6 = x + 18
2x + 6 - x = 18
2x - x = 18 - 6
1x = 12
x = 12/1
x = 12
CASO seja ( NEGATIVO) (-)
2x - 6 = x + 18
2x - 6 - x = 18
2x - x = 18 + 6
1x = 24
x =24/1
x = 24
b)5x-3=2x+9
5x - 3 = 2x + 9
5x - 3 - 2x = 9
5x - 2x = 9 + 3
3x = 12
x = 12/3
x = 4
c)3(2x-3)+2(x+1)=3x+18
6x - 9 + 2x + 2 = 3x + 18
6x + 2x - 9 + 2 = 3x + 18
8x - 7 = 3x + 18
8x - 7 - 3x = 18
8x - 3x = 18 + 7
5x = 25
x = 25/5
x = 5
d)2x+3(x-5)=4x+9
2x + 3x - 15 = 4x + 9
5x - 15 = 4x + 9
5x - 15 - 4x = 9
5x - 4x = 9 + 15
1x = 24
x = 24/1
x = 24
e)2(x+1)-3(2x-5)=6x-3
2x + 2 - 6x + 15 = 6x - 3
2x - 6x + 2 + 15 = 6x - 3
- 4x + 17 = 6x - 3
- 4x - 6x = - 3 - 17
- 10x = - 20
x = - 20/-10
x = 20/10
x = 2
f)3x-5=x-2
3x - 5 - x =- 2
3x - x = -2 + 5
2x = 3
x = 3/2
g)3x-5=13
3x = 13 + 5
3x = 18
x = 18/3
x = 6
h)3x+5=2
3x = 2 - 5
3x = - 3
x = -3/3
x = - 1
i)x-(2x-1)=23
x - 2x + 1 = 23
- 1x + 1 = 23
- 1x = 23 - 1
- 1x = 22
x = 22/-1
x = - 22/1
x = - 22
Respondido por
0
a)
2x + 6 = x + 18
2x - x = 18 - 6
x = 12
*****************************
2x - 6 = x + 18
2x - x = 18 + 6
x = 24
***************************
b)
5x - 3 = 2x + 9
5x - 2x = 9 + 3
3x = 12
x = 12/3
x = 4
*****************************************
c)
3.(2x - 3) + 2.(x + 1) = 3x + 18
6x - 9 + 2x + 2 = 3x + 18
6x + 2x - 9 + 2 = 3x + 18
8x - 7 = 3x + 18
8x - 3x = 18 + 7
5x = 25
x = 25/5
x = 5
*******************************
d)
2x + 3.(x - 5) = 4x + 9
2x + 3x - 15 = 4x + 9
5x - 15 = 4x + 9
5x - 4x = 9 + 15
x = 24
*************************************
e)
2.(x + 1) - 3.(2x - 5) = 6x - 3
2x + 2 - 6x + 15 = 6x - 3
2x - 6x + 2 + 15 = 6x - 3
- 4x + 17 = 6x - 3
17 + 3 = 6x + 4x
20 = 10x
10x = 20
x = 20/10
x = 2
****************************
f)
3x - 5 = x - 2
3x - x = - 2 + 5
2x = 3
x = 3/2
*****************************
g)
3x - 5 = 13
3x = 13 + 5
3x = 18
x = 18/3
x = 6
********************************
h)
3x + 5 = 2
3x = 2 - 5
3x = - 3
x = - 3/3
x = - 1
*****************************
i)
x - (2x - 1) = 23
x - 2x + 1 = 23
- x + 1 = 23
- x = 23 - 1
- x = 22 (-1)
x = - 22
**************************************
2x + 6 = x + 18
2x - x = 18 - 6
x = 12
*****************************
2x - 6 = x + 18
2x - x = 18 + 6
x = 24
***************************
b)
5x - 3 = 2x + 9
5x - 2x = 9 + 3
3x = 12
x = 12/3
x = 4
*****************************************
c)
3.(2x - 3) + 2.(x + 1) = 3x + 18
6x - 9 + 2x + 2 = 3x + 18
6x + 2x - 9 + 2 = 3x + 18
8x - 7 = 3x + 18
8x - 3x = 18 + 7
5x = 25
x = 25/5
x = 5
*******************************
d)
2x + 3.(x - 5) = 4x + 9
2x + 3x - 15 = 4x + 9
5x - 15 = 4x + 9
5x - 4x = 9 + 15
x = 24
*************************************
e)
2.(x + 1) - 3.(2x - 5) = 6x - 3
2x + 2 - 6x + 15 = 6x - 3
2x - 6x + 2 + 15 = 6x - 3
- 4x + 17 = 6x - 3
17 + 3 = 6x + 4x
20 = 10x
10x = 20
x = 20/10
x = 2
****************************
f)
3x - 5 = x - 2
3x - x = - 2 + 5
2x = 3
x = 3/2
*****************************
g)
3x - 5 = 13
3x = 13 + 5
3x = 18
x = 18/3
x = 6
********************************
h)
3x + 5 = 2
3x = 2 - 5
3x = - 3
x = - 3/3
x = - 1
*****************************
i)
x - (2x - 1) = 23
x - 2x + 1 = 23
- x + 1 = 23
- x = 23 - 1
- x = 22 (-1)
x = - 22
**************************************
Perguntas interessantes