Упрастите выражение.
1)-1,6x*(-5y)
2)-7a-9d+a+11b
3) a-. (a-8)+(12+a)
4) -3 (c-5)+6 (c+3)
1)-1,6x*(-5y)
2)-7a-9d+a+11b
3) a-. (a-8)+(12+a)
4) -3 (c-5)+6 (c+3)
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Answers & Comments
2)-6а+2б
3)а+20
4)3с-3
4)-3(c-5)+(c+3)=-3c+15+6c+18=3c+33