ДАЮ 25 БАЛЛОВ!!! СРОЧНО!
Приведение подобных слагаемых
упростите выражение:
4(3а+1,6)-(5+2а)-3(а-12)=
-1,5(6-х)-2(-х-3)+0,9(5х-1)
0,8(2у-3)+5(1,6-0,5у)-2(0,8у-1,7)

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