Упрости выражение
1) -2,4a•(-5b);
2) 9a-a-8b+3b;
3) a+(a-10)-(15+a);
4) -4(b-4)+7(b+2);
1) -2,4a•(-5b);
2) 9a-a-8b+3b;
3) a+(a-10)-(15+a);
4) -4(b-4)+7(b+2);
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Answers & Comments
2) = 8a - 11b
3) = a - 25
4) = - 4b - 16 + 7b + 14 = 11b - 2