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x= 3
x-5=-2| +5
x=3
-3x=-9 | :-3
x=3
x/3=1 |*3
x=3
2x=6 |:2
x=3
x+3=6 |-3
x=3
x-7=-4|+7
x=3
x-3=0|+3
x=3
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