Предмет: Алгебра, автор: Аноним

x(2x+3)-5(x^2-3x)=3x(7-x) помогите умоляю. дам 100 баллов

Ответы

Автор ответа: Konnie

2x^2 + 3x - 5(x^2 - 3x) = 3x(7-x)
2x^2 + 3x - 5x^2 + 15x = 3x(7-x)
2x^2 + 3x - 5x^2 + 15x = 21x-3x^2
-3x^2+18x = 21x - 3x^2
-3x^2+3x^2= 21x-18x
0 = 3x
x = 0/3
x = 0

Автор ответа: Аноним

спасибо

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