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3x=6
x=6/3
x=2
B) -5x=36+x
-5x-x=36
-6x=36
x= -36/6
x= -6
C) 2x-10=6
2x=6+10
2x=16
x=16/2
x=8
D) -x+9=3x
-x-3x= -9
-4x= -9
x= -9/-4
x=9/4
E) 12-3x+9= -4x
-3x+4x= -12-9
x= -21
F) 7x-9= -6x+4
7x+6x=4+9
13x=13
x=13/13
x=1
Espero haberte ayudado ;)
3x=6
x=6/3
x=2
B) -5x=36+x
-5x-x=36
-6x=36
x= -36/6
x= -6
C) 2x-10=6
2x=6+10
2x=16
x=16/2
x=8
D) -x+9=3x
-x-3x= -9
-4x= -9
x= -9/-4
x=9/4
E) 12-3x+9= -4x
-3x+4x= -12-9
x= -21
F) 7x-9= -6x+4
7x+6x=4+9
13x=13
x=13/13
x=1