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x= 1-x
x+x=1
2x=1
x=1/2
b)
3x+x=--3
4x= -3
x= -3/4
c)
3x-3=2x+2
3x-2x=2+3
x=5
d)
x( +3)=2+4x
3x= 2+4x
3x-4x=2
-1x=2
x= -2
e)
3x=2+x
3x-x=2
2x=2
x=1
;)