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Автор - lololoshka6143

задания ........ .......​

Ответ

Автор - nazgul2606

Ответ:

Объяснение:

Вот что смогла

Ответ

Автор - snikoloenak26

1)  a)(4y^2+15y)-(17y-y^3)=4y^2+15y-17y+y^3=y^3+4y^2-2y

    б)2a(3a-b+4)=6a^2-2ab+8a

2) a)2ab-ab^2=ab(2-ab)

    б)2x^2+4x^6=2x^2(1+2x^4)\

3)

5(x-3)=14-2(7-2x)\5x-15=14-1444x\x=15

4)

x+y+z=56\y=x+12\z=2x\x+x+12+2x=56\4x=44\x=11\y=23\z=22

5)

frac{3-x}{3}=frac{x+1}{2} -frac{3x}{4} \4(3-x)=6(x+1)-3(3x)\12-4x=6x+6-9x\-4x+9x-6x=6-12\x=6

В третьём там опечатка. вмето -1444х там -14+4х

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