a)X -3\2= -11
B)X -3/2=-11 -x
C)x -3/2=-11
D)x/5 - 3/2=-11
E)5.(2X -3)-3 X= -11
Anônimo:
na A, qual número acima do 2? x - 3 ou - 3?
Respostas
respondido por:
2
A)X -3\2= -11
x - 3 = - 11
-------
2
x - 3 = 2.(-11)
x - 3 = - 22
x = - 22 + 3
x = - 19
******************************************
B)X -3/2=-11 -x
x - 3 = - 11 - x
-----
2
2x - 3 = 2(-11 - x)
-------- --------------
2 2
2x - 3 = - 22 -2x
2x + 2x = - 22 + 3
4x = -19
x = - 19/4
****************************
C)x -3/2=-11
x - 3 = - 11
-----
2
2x - 3 = 2.(-11)
------- ------------
2 2
2x - 3 = - 22
2x = - 22 + 3
2x = - 19
x = - 19/2
******************************
D)
x/5 - 3/2 = - 11
x - 3 = - 11
---- -----
5 2
2x - 5.3 10.(-11)
------------ = --------------
10 10
2x - 15 = -110
2x = - 110 + 15
2x = - 95
x = - 95/2
************************************
E)
5.(2x - 3) - 3x = -11
10x - 15 - 3x = - 11
7x - 15 = - 11
7x = - 11 + 15
7x = 4
x = 4/7
**************************************
x - 3 = - 11
-------
2
x - 3 = 2.(-11)
x - 3 = - 22
x = - 22 + 3
x = - 19
******************************************
B)X -3/2=-11 -x
x - 3 = - 11 - x
-----
2
2x - 3 = 2(-11 - x)
-------- --------------
2 2
2x - 3 = - 22 -2x
2x + 2x = - 22 + 3
4x = -19
x = - 19/4
****************************
C)x -3/2=-11
x - 3 = - 11
-----
2
2x - 3 = 2.(-11)
------- ------------
2 2
2x - 3 = - 22
2x = - 22 + 3
2x = - 19
x = - 19/2
******************************
D)
x/5 - 3/2 = - 11
x - 3 = - 11
---- -----
5 2
2x - 5.3 10.(-11)
------------ = --------------
10 10
2x - 15 = -110
2x = - 110 + 15
2x = - 95
x = - 95/2
************************************
E)
5.(2x - 3) - 3x = -11
10x - 15 - 3x = - 11
7x - 15 = - 11
7x = - 11 + 15
7x = 4
x = 4/7
**************************************
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