Помогите, пожалуйста!!! 50 баллов!!!!!!
27а-3а+2а=; 43b+57b=;
18n+6+3n=; 72m+6m+2m=;
2a+10a+2=; 80b-2b+6b=;
24c+3c+5=; 48d-35d=;
34m-15m=; 40n-12n+n=;
27n-15n=; 9m-6m+15=;
38x+4x-x=; 8y+y-y=;
13m-6m+2=; 33n+6m+m=.
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