Помогите решить уравнение 45+7x-6x=68 , 5x-4x+23=67 , (13-x)-4=3 , 34+(x+12)=79 , (5+x)-14=6 , x+6-3=21 , 4x+5(3x-12)=35 , (18-x)+3=14 , 16+4x-3x-5=19 , 456+(x-367)-225=898 , 63:(2#x-1)=21:3
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