Pomogite reshit uravneniya(raspisat ) 1)8y-3(2y-3)=7y-2(5y+8) - вопрос №22189401832372582529 от natilis 09.09.2020 08:14

Question

Математика: Pomogite reshit uravneniya(raspisat ) 1)8y-3(2y-3)=7y-2(5y+8) 2)5(2y-9)+6y=4(3y-2)-21 3)5y+7(3-y)=3(5-2y)-6 4)7y-4(3y+5)=2-3(4y-9)

natilis · Answer

1)раскрываем скобки:   8y-6y+9=7y-10y-162y+9=-3y-162y+3y=-16-95y=-25y=-52)10y-45+6y=12y-8-2116y-45=12y-294y=16y=4...

Pomogite reshit' uravneniya(raspisat') 1)8y-3(2y-3)=7y-2(5y+8) 2)5(2y-9)+6y=4(3y-2)-21 3)5y+7(3-y)=3(5-2y)-6 4)7y-4(3y+5)=2-3(4y-9)