1) Resolva as questões,sendo U=Q:
d) 5x + 7 = 4x + 10
e) 4x - 10 = 2x = + 2
f) 4x - 7 = 8x - 2
g) 2x + 1 = 4x - 7
h) 9x + 9 + 3x = 15
i) 16x - 1 = 12x = + 3
j) 3x - 2 = 4x + 9
Usuário anônimo:
na i, tem um = a mais
Soluções para a tarefa
Respondido por
8
D)5x+7=4x+10
5x-4x=10-7
x=3
F)4x-7=8x-2
4x-8x=-2+7
-4x=5
x=5/-4
G)2x+1=4x-7
2x-4x=-7-1
-2x=-8
x=-8/-2
x=4
H)9x+9+3x=15
9x+3x=15-9
12x=6
x=6/12
x=0,5
J)3x-2=4x+9
3x-4x=9+2
-x=11
x=11
5x-4x=10-7
x=3
F)4x-7=8x-2
4x-8x=-2+7
-4x=5
x=5/-4
G)2x+1=4x-7
2x-4x=-7-1
-2x=-8
x=-8/-2
x=4
H)9x+9+3x=15
9x+3x=15-9
12x=6
x=6/12
x=0,5
J)3x-2=4x+9
3x-4x=9+2
-x=11
x=11
Respondido por
9
d)
5x + 7 = 4x + 10
5x - 4x = 10 - 7
x = 3
Resp.: Sendo U = Q, x = 3
----------------------------------------
e)
4x - 10 = 2x + 2
4x - 2x= 2 + 10
2x = 12
x = 12/2
x = 6
Resp.: Sendo U = Q, x = 6
--------------------------------------
f)
4x - 7 = 8x - 2
- 7 + 2 = 8x - 4x
- 5 = 4x
4x = - 5
x = - 5/4
Resp.: Sendo U = Q, x = - 5/4
-----------------------------------
g)
2x + 1 = 4x - 7
1 + 7 = 4x - 2x
8 = 2x
2x = 8
x = 8/2
x = 4
Resp.: Sendo U = Q, x = 4
-------------------------------
h)
9x + 9 + 3x = 15
9x + 3x + 9 = 15
9x + 3x = 15 - 9
12x = 6
x = 6 (:6) 1
---- = ----
12 (:6) 2
x = 1/2
Resp.: Sendo U = Q, x = 1/2
-------------------------------------
i)
16x - 1 = 12x + 3
16x - 12x = 3 + 1
4x = 4
x = 4/4
x = 1
Resp.: Sendo U = Q, x = 1
------------------------------
j)
3x - 2 = 4x + 9
- 2 - 9 = 4x - 3x
- 11 = x
x = - 11
Resp.: Sendo U = Q, x = - 11
=========================
a)
5x - 3 + x = 2x + 9
5x + x - 3 = 2x + 9
6x - 3 = 2x + 9
6x - 2x = 9 + 3
4x = 12
x = 12/4
x = 3
Resp.: Sendo U = Q, x = 3
****************************************
b)
17x - 7x = x + 18
10x = x + 18
10x - x = 18
9x = 18
x = 18/9
x = 2
Resp.: Sendo U = Q, x = 2
-------------------------------------------------
c)
x + x - 4 = 17 - 2x + 1
2x - 4 = 17 + 1 - 2x
2x - 4 = 18 - 2x
2x + 2x = 18 + 4
4x = 22
x = 22 (:2) 11
---- = ----
4 (:2) 2
Resp.: Sendo U = Q, x = 11/2
-----------------------------------------------------
d)
x + 2x + 3 - 5x = 4x - 9
3x + 3 - 5x = 4x - 9
3x - 5x + 3 = 4x - 9
- 2x + 3 = 4x - 9
3 + 9 = 4x + 2x
12 = 6x
6x = 12
x = 12/6
x = 2
Resp.: Sendo U = Q, x = 2
--------------------------------------------------------------
e)
5x + 6x - 16 = 3x + 2x - 4
11x - 16 = 5x - 4
11x - 5x = - 4 + 16
6x = 12
x = 12/6
x = 2
Resp.: Sendo U = Q, x = 2
----------------------------------------------------
f)
5x + 4 = 3x - 2x + 4
5x + 4 = x + 4
5x - x = 4 - 4
4x = 0
x = 0/4
x = 0
Resp.: Sendo U = Q, x = 0
5x + 7 = 4x + 10
5x - 4x = 10 - 7
x = 3
Resp.: Sendo U = Q, x = 3
----------------------------------------
e)
4x - 10 = 2x + 2
4x - 2x= 2 + 10
2x = 12
x = 12/2
x = 6
Resp.: Sendo U = Q, x = 6
--------------------------------------
f)
4x - 7 = 8x - 2
- 7 + 2 = 8x - 4x
- 5 = 4x
4x = - 5
x = - 5/4
Resp.: Sendo U = Q, x = - 5/4
-----------------------------------
g)
2x + 1 = 4x - 7
1 + 7 = 4x - 2x
8 = 2x
2x = 8
x = 8/2
x = 4
Resp.: Sendo U = Q, x = 4
-------------------------------
h)
9x + 9 + 3x = 15
9x + 3x + 9 = 15
9x + 3x = 15 - 9
12x = 6
x = 6 (:6) 1
---- = ----
12 (:6) 2
x = 1/2
Resp.: Sendo U = Q, x = 1/2
-------------------------------------
i)
16x - 1 = 12x + 3
16x - 12x = 3 + 1
4x = 4
x = 4/4
x = 1
Resp.: Sendo U = Q, x = 1
------------------------------
j)
3x - 2 = 4x + 9
- 2 - 9 = 4x - 3x
- 11 = x
x = - 11
Resp.: Sendo U = Q, x = - 11
=========================
a)
5x - 3 + x = 2x + 9
5x + x - 3 = 2x + 9
6x - 3 = 2x + 9
6x - 2x = 9 + 3
4x = 12
x = 12/4
x = 3
Resp.: Sendo U = Q, x = 3
****************************************
b)
17x - 7x = x + 18
10x = x + 18
10x - x = 18
9x = 18
x = 18/9
x = 2
Resp.: Sendo U = Q, x = 2
-------------------------------------------------
c)
x + x - 4 = 17 - 2x + 1
2x - 4 = 17 + 1 - 2x
2x - 4 = 18 - 2x
2x + 2x = 18 + 4
4x = 22
x = 22 (:2) 11
---- = ----
4 (:2) 2
Resp.: Sendo U = Q, x = 11/2
-----------------------------------------------------
d)
x + 2x + 3 - 5x = 4x - 9
3x + 3 - 5x = 4x - 9
3x - 5x + 3 = 4x - 9
- 2x + 3 = 4x - 9
3 + 9 = 4x + 2x
12 = 6x
6x = 12
x = 12/6
x = 2
Resp.: Sendo U = Q, x = 2
--------------------------------------------------------------
e)
5x + 6x - 16 = 3x + 2x - 4
11x - 16 = 5x - 4
11x - 5x = - 4 + 16
6x = 12
x = 12/6
x = 2
Resp.: Sendo U = Q, x = 2
----------------------------------------------------
f)
5x + 4 = 3x - 2x + 4
5x + 4 = x + 4
5x - x = 4 - 4
4x = 0
x = 0/4
x = 0
Resp.: Sendo U = Q, x = 0
s = - (-30)/3; soma = 30/3; soma = 10
p = c/a ; p = 27/3; produto = 9
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