Раскройте скобки и приведите подобные слагаемые:
-4х-8(9-2х)
6(3х-2)+4(5х-1)
-7(3-4с)+14(0,5+2с)
3(2,1х-у)-2,8(2х-3у)
-4х-8(9-2х)
6(3х-2)+4(5х-1)
-7(3-4с)+14(0,5+2с)
3(2,1х-у)-2,8(2х-3у)
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Answers & Comments
6(3х-2)+4(5х-1)=18х-12+20х-4=38х-16
-7(3-4с)+14(0,5+2с)=-21+28с+7+28с=56с-14
3(2,1х-у)-2,8(2х-3у)=6,3х-3у-5,6х+8,4у=0,7х+5,4у