a)x-8\2-4=x
b)4x\3-3\2=x-3\3
c)3-x\8=x+1\4-x\3
d)t-5\2-1\3=t\3-3t+14\12
Anônimo:
x+1
Respostas
respondido por:
2
A) x - 8\2 - 4 = x
a)
x - 8 - 4 = x
--------
2
x - 8 - 8 = 2x
x - 16 = 2x
- 16 = 2x - x
- 16 = x
x = - 16
****************************
b)
4x\3-3\2=x-3\3
4x - 3 = x - 3
---- ---- --------
3 2 3
mmc (3,2) = 6
2.4x - 3.3 = 2.(x - 3)
------------- -------------
6 6
8x - 9 = 2x - 6
8x - 2x = - 6 + 9
6x = 3
x = 3 (:3) 1
--- = -----
6 (:3) 2
x = 1/2
**************************************
b)
4x - 3 = x - 3
---- ---- ---
3 2 3
4x - 3 = x - 1
---- ----
3 2
2.4x - 3.3 = 6x - 6
------------- ---------
6 6
8x - 9 = 6x - 6
8x - 6x = - 6 + 9
2x = 3
x = 3
----
2
*************************************
c)3-x\8=x+1\4-x\3
3 - x = x + 1 - x
--------- ------ ----
8 4 3
3.(3 - x) = 6.(x + 1) - 8x
---------- ------------------
24 24
9 - 3x = 6x + 6 - 8x
9 - 3x = - 2x + 6
9 - 6 = - 2x + 3x
3 = x
x = 3
***********************************
mmc (8,4,3) = 24
8,4,3: 2
4,2,3: 2
2,1,3: 2
1,1,3: 3
--------------
1,1,1 = 2.2.2.3 = 8.3 = 24
d)
t-5\2-1\3=t\3-3t+14\12
t - 5 - 1 = t - 3t + 14
----- --- ---- -----------
2 3 3 12
6.(t - 5) - 4.1 = 4.t - 1(3t + 14)
---------------- --------------------
12 12
6t - 30 - 4 = 4t - 3t - 14
6t - 34 = t - 14
6t - t = - 14 + 34
5t = 20
t = 20/5
t = 4
_________________________________
2,3,3,12: 2
1,3,3,6: 2
1,3,3,3: 3
----------------
1,1,1,1 = 2.2.3 = 4.3 = 12
a)
x - 8 - 4 = x
--------
2
x - 8 - 8 = 2x
x - 16 = 2x
- 16 = 2x - x
- 16 = x
x = - 16
****************************
b)
4x\3-3\2=x-3\3
4x - 3 = x - 3
---- ---- --------
3 2 3
mmc (3,2) = 6
2.4x - 3.3 = 2.(x - 3)
------------- -------------
6 6
8x - 9 = 2x - 6
8x - 2x = - 6 + 9
6x = 3
x = 3 (:3) 1
--- = -----
6 (:3) 2
x = 1/2
**************************************
b)
4x - 3 = x - 3
---- ---- ---
3 2 3
4x - 3 = x - 1
---- ----
3 2
2.4x - 3.3 = 6x - 6
------------- ---------
6 6
8x - 9 = 6x - 6
8x - 6x = - 6 + 9
2x = 3
x = 3
----
2
*************************************
c)3-x\8=x+1\4-x\3
3 - x = x + 1 - x
--------- ------ ----
8 4 3
3.(3 - x) = 6.(x + 1) - 8x
---------- ------------------
24 24
9 - 3x = 6x + 6 - 8x
9 - 3x = - 2x + 6
9 - 6 = - 2x + 3x
3 = x
x = 3
***********************************
mmc (8,4,3) = 24
8,4,3: 2
4,2,3: 2
2,1,3: 2
1,1,3: 3
--------------
1,1,1 = 2.2.2.3 = 8.3 = 24
d)
t-5\2-1\3=t\3-3t+14\12
t - 5 - 1 = t - 3t + 14
----- --- ---- -----------
2 3 3 12
6.(t - 5) - 4.1 = 4.t - 1(3t + 14)
---------------- --------------------
12 12
6t - 30 - 4 = 4t - 3t - 14
6t - 34 = t - 14
6t - t = - 14 + 34
5t = 20
t = 20/5
t = 4
_________________________________
2,3,3,12: 2
1,3,3,6: 2
1,3,3,3: 3
----------------
1,1,1,1 = 2.2.3 = 4.3 = 12
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