6.5x-32.5-6x+20=0
0.5x=12
x=24
(6,х - 32,5)-(6х -20)= 6х-(32,5-20)=6х-12,5
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6.5x-32.5-6x+20=0
0.5x=12
x=24
(6,х - 32,5)-(6х -20)= 6х-(32,5-20)=6х-12,5