Упростите выражения: 18m+22m 12y-7y 12x+12x-6x c+14c 25t-13t 13y-y-y 4x+x 17k-k 3a-3a+8a
18m+22m=40m 12y-7y=5y 12x+12x-6x=24x-6x=18x c+14c=15c 25t-13t=12t 13y-y-y=12y-y=11y 4x+x=5x 17k-k=16k 3a-3a+8a=0a+8a=8a