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-1-3=5x-x
-4=4x
x=4/-4
x=-1
3(x-5)=2(x+1)
3x-15=2x+2
3x-2x=2+15
x=17
x-1/2 -x -3/3=2x
x-x-2x=1/2+1
2(x-x-2x)=1+1(2)
2X-2X-4X= 3
-4x=3
x=
Espero que sirva! Saludos!