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-5x+12+x=2x-12
-4x+12=2x-12
6x=24
x=4
2(x-3)+3(4-x)=5
2x-6+12-3x=5
x=1
2x-6+12-3x=5
5=5
-6x+24=2x
24=8x |;8
4=x
-5*4+12+4=2*4-12
-4=4
L≠P
2(x-3)+3(4-x)=5
2x-6+12-3x=5
x=1
2x-6+12-3x=5
5=5