443 пжжжжж 1 2 строчка пжжжж
№443
1)8a+3a=11a; 2)x+21x=22x; 3)24y+28y=52y; 4)2a+3a+4=5a+4;
12b-7b=5b; 27y-23y=4y; 46m-9m=37m; 7x-x-6=6x-6;