1)6а+8а
2)28с-2c
3)13y-2y
4)m+29m
5)98p-p
6)17k+k
7)4x+13x+15x
8)67z-18z+37
9)35x+x-6
С решением например:18m-13m=m(18-13)=m.5=5m
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