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solpolrocknroll
@solpolrocknroll
August 2022
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Помогите решить примеры, пожалуйста :)
а) (-0,5у)*20*(-3х)
б) (-а+ 3в - 1,2)*5
в) -2,1*(х - 2у + 3)
г) 2,3у - 1,7*(у - 2) + 0,3*(4 - 2у)
д) 6а - (5а - (4а - 3))
е) -(4у - 9(2у - 1)) - 14у
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Answers & Comments
dashachkeeva
А) (-0,5y)*20*(-3x)=30xy
б) (-a+3b-1.2)*5=-5a+15b-6
в)-2,1*(x-2y+3)=-2.1x+4.2y-6.3
г)2.3y-1.7*(y-2)+0.3*(4-2y)=2.3y-1.7y+3.4+1.2-0.6y=4.6
д)6a-(5a-(4a-3))=6a-(5a-4a+3)=6a-5a+4a-3=5a-3
е)-(4y-9(2y-1))-14y=-(4y-18y+9)-14y=-4y+18y-9-14y=-9
5 votes
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Answers & Comments
б) (-a+3b-1.2)*5=-5a+15b-6
в)-2,1*(x-2y+3)=-2.1x+4.2y-6.3
г)2.3y-1.7*(y-2)+0.3*(4-2y)=2.3y-1.7y+3.4+1.2-0.6y=4.6
д)6a-(5a-(4a-3))=6a-(5a-4a+3)=6a-5a+4a-3=5a-3
е)-(4y-9(2y-1))-14y=-(4y-18y+9)-14y=-4y+18y-9-14y=-9