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4x=3-4
4x=-1/:4
x=-0,25
9 - 2m = 5 - 2m
3x + 5 - 7x = 2 - 4x + 3
-4x+4x=5-5
0=0
3x - 2 + 5x = 4x + 8 -x
8x-4x+x=8+2
5x=10/:5
x=2