resolva as equações, sendo u=q
(a) x+ 1/2=3/2
(b) x/7=-2
(C) -9 x+8=-43
(D) x-3(4-x)=7x-(1-x)
(e) x/4-7/10=2x/5-1
(f) x-1/4+3x-7/6=2x-3/3
(G)x-4/3-1=x-2/8
aquiles1987:
vai no site wolfram site , digita dessa forma lá ;)
Soluções para a tarefa
Respondido por
127
x 1 3
----- + ---- = ------
1 2 2
x 3 1
----- = ------ - -------
1 2 2
x 2
---- = -----
1 2
x = 1
================================================
x 2
----- = - -----
7 1 multiplique cruzado
x = - 14
===================================================
- 9x + 8 = - 43
- 9x = - 43 - 8
- 9x = - 51 .(-1)
9x = 51
x = 51/9
x = 17/3
===========================
x - 3( 4 - x) = 7x - ( 1 - x) =
x - 12 + 3x = 7x - 1 + x =
4x - 12 = 8x - 1
4x - 8x = - 1 + 12
- 4x = 11 .(-1)
4x = - 11
x = - 11/4
====================================
x 7 2x 1
----- - ----- = ------- - -----
4 10 5 1 mmc = 20
5x 14 8x 20
------ - ------ = ------ - ------
20 20 20 20 simplifique os 20
5x - 14 = 8x - 20
5x - 8x = - 20 + 14
- 3x = - 6 .(-1)
3x = 6
x = 6/2
x = 3
================================================
x - 1 3x - 7 2x - 3
-------- + --------- = ---------
4 6 3 mmc = 12
3(x - 1) 2(3x - 7) 4(2x - 3)
----------- + ------------- = --------------
12 12 12 simplifique os 12
3(x - 1) + 2(3x - 7) = 4(2x - 3)
3x - 3 + 6x - 14 = 8x - 12
9x - 17 = 8x - 12
9x - 8x = - 12 + 17
x = 5
==============================================
x - 4 1 x - 2
---------- - ---- = --------
3 1 8 mmc = 24
8(x - 4) 24 3(x - 2)
------------ - ------- = -----------
24 24 24 simplifique os 24
8(x - 4) - 24 = 3(x - 2)
8x - 32 - 24 = 3x - 6
8x - 56 = 3x - 6
8x - 3x = - 6 + 56
5x = 50
x = 50/5
x = 5
----- + ---- = ------
1 2 2
x 3 1
----- = ------ - -------
1 2 2
x 2
---- = -----
1 2
x = 1
================================================
x 2
----- = - -----
7 1 multiplique cruzado
x = - 14
===================================================
- 9x + 8 = - 43
- 9x = - 43 - 8
- 9x = - 51 .(-1)
9x = 51
x = 51/9
x = 17/3
===========================
x - 3( 4 - x) = 7x - ( 1 - x) =
x - 12 + 3x = 7x - 1 + x =
4x - 12 = 8x - 1
4x - 8x = - 1 + 12
- 4x = 11 .(-1)
4x = - 11
x = - 11/4
====================================
x 7 2x 1
----- - ----- = ------- - -----
4 10 5 1 mmc = 20
5x 14 8x 20
------ - ------ = ------ - ------
20 20 20 20 simplifique os 20
5x - 14 = 8x - 20
5x - 8x = - 20 + 14
- 3x = - 6 .(-1)
3x = 6
x = 6/2
x = 3
================================================
x - 1 3x - 7 2x - 3
-------- + --------- = ---------
4 6 3 mmc = 12
3(x - 1) 2(3x - 7) 4(2x - 3)
----------- + ------------- = --------------
12 12 12 simplifique os 12
3(x - 1) + 2(3x - 7) = 4(2x - 3)
3x - 3 + 6x - 14 = 8x - 12
9x - 17 = 8x - 12
9x - 8x = - 12 + 17
x = 5
==============================================
x - 4 1 x - 2
---------- - ---- = --------
3 1 8 mmc = 24
8(x - 4) 24 3(x - 2)
------------ - ------- = -----------
24 24 24 simplifique os 24
8(x - 4) - 24 = 3(x - 2)
8x - 32 - 24 = 3x - 6
8x - 56 = 3x - 6
8x - 3x = - 6 + 56
5x = 50
x = 50/5
x = 5
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