10y-9+6y=12y-8-21 решите пж

Question

10y-9+6y=12y-8-21 решите пж

Answer 1

10y+6y-12y=-8-21+9
4y=-20
y=-20:4
y=-5

Comments

8y-3(2y-3)=7y-2(5y+8) решите пж

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8y-6y+9=7y-10y-16 
 Аватар пользователя DashkaTiteeva99 
8y-6y-7y+10y=-16-9 
 Аватар пользователя DashkaTiteeva99 
5y=-25 
 Аватар пользователя DashkaTiteeva99 
y=-25:5 
 y=-5

Answer 2

10y-9+6y=12y-8-21
10y+6y-12y=9-8-21
4y=-20
y=-20:4
y=-5 8y-3 (2y-3)=7y-2 (5y+8) 8y-6y+9=7y-10y-16 8y-6y-7y+10y=-16-9 5y=-25 y= -25:5 y= -5

Comments

8y-3(2y-3)=7y-2(5y+8) решите пж

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8y-6y+9=7y-10y-16

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8y-6y-7y+10y=-16-9

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5y=-25

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y=-25:5

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y=-5