Ответ:
1) 8(6a-7)-17a= 48а-56-17а=48а-17а-56= 31а-56
2)6b-7(14-3b)= 6b-98+21b= 6b+21b-98=27b-98
3)(5,3+a)-(a+6,4)=5,3+а-а-6,4= 5,3-6,4+а-а= -1,1
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Ответ:
1) 8(6a-7)-17a= 48а-56-17а=48а-17а-56= 31а-56
2)6b-7(14-3b)= 6b-98+21b= 6b+21b-98=27b-98
3)(5,3+a)-(a+6,4)=5,3+а-а-6,4= 5,3-6,4+а-а= -1,1