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x=57-75
x=-18
b) x-34=-35
x=-35+34
x=-1
c) 3-x=-2x
-x=-3
x=3
x=-18
x-34=-35|+34
x=-1
3-x=-2x |+X
3=-x
-3=x
x=-3
x=18
x=-35+34
x=-1
x=-2x-3
x=5