Розкрити дужки і спростити вираз :
1) 4 ( 8a - 5 ) + 5a ;
2) 2 ( b - 1 ) -2b + 13 ;
3) 3,7 ( a - b ) +4,2 ( a + b ) ; 4 ) 15-4 ( 1 - a ) -8a ; 5 ) - ( - 2,8-14b ) + ( 7b - 2 ) - ( -3);
6 ) 3 ( 6x - 16y ) -3 ( 12x - 3y )
Помогите решить!
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