7а+15а=7*3+15*3=66
23b+16b=23*8+16*8=312
44x-18x=44*5-18*5=130
14y+33y-45y=14*17+33*17-45*17=34
52m -25m+45m= 52*9-25*9+45*9=648
18n+34n-22=18*6+34*6-22=290
7а+15а=7*3+15*3=66
23b+16b=23*8+16*8=312
44x-18x=44*5-18*5=130
14y+33y-45y=14*17+33*17-45*17=34
52m -25m+45m= 52*9-25*9+45*9=648
18n+34n-22=18*6+34*6-22=290