решите:
1)7a+7*3;
2)16*5+5b;
3)14c-14*3;
4)8d-8*5;
5)6a+6*3+6b;
6)9a+9b-9c;
1)7a+7*3;
2)16*5+5b;
3)14c-14*3;
4)8d-8*5;
5)6a+6*3+6b;
6)9a+9b-9c;
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Answers & Comments
1) 7а+7*3=7а+21=7(a+3)
2)16*5+5b=80+5b=5(16+b)
3)14c-14*3=14c-42=14(c-3)
4)8d-8*5=8d-40=8(d-5)
5)6a+6*3+6b=6a+18+6b=6(a+3+b)
6)9a+9b-9c=9(a+b-c)