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ternovaavala
@ternovaavala
July 2022
2
4
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Упростите выражение:
а) 8+3а-5а+а-9а
б) 7(n-3)-5(n+4)-3(3n-8)
в) 5/7*(2,8с-4 1/5d)-2,4*(5/6c-1,5d)
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everyday2
8+(3а-5а+а-9а)=8+(-10)=-2
0 votes
Thanks 1
everyday2
7n-21-5n+20-9n-24=-7n-25
ternovaavala
Спасибо
Orbit1White
А)8-10а
б)7n-21-5n-20-9n+24=-7n-17
в)1действие:5/7*28/10c=5/7*28/10c=1*4/1*2=4/2=2c
5/7*(-4 1/5d)=5/7*(-21/5d)=-1*3/1*1=-3/1=-3d
2 действие:-2,4*5/6с=-2 4/10*5/6с=-24/10*5/6с=-4/2=-2с
-2,4*(-1,5d)=3,6d
2c-3d-2c+3,6d=0,6d
2 votes
Thanks 1
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Answers & Comments
б)7n-21-5n-20-9n+24=-7n-17
в)1действие:5/7*28/10c=5/7*28/10c=1*4/1*2=4/2=2c
5/7*(-4 1/5d)=5/7*(-21/5d)=-1*3/1*1=-3/1=-3d
2 действие:-2,4*5/6с=-2 4/10*5/6с=-24/10*5/6с=-4/2=-2с
-2,4*(-1,5d)=3,6d
2c-3d-2c+3,6d=0,6d