ПОМОГИТЕ. Вопрос жизни и смерти!!. Created by Vitaliyastrov. algebra-ru

ПОМОГИТЕ. Вопрос жизни и смерти!!...

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$\frac{5x+4}{2}+3=\frac{9x}{4}\\\\\frac{5x+4}{2}*4+3*4=\frac{9x}{2}*4\\\\2(5x+4)+12=2*9x\\\\10x+8+12=18x\\\\10x-18x=-20\\\\-8x=-20\\\\x=2,5\\\\Otvet:\boxed{2,5}$

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KloakaDoctor

Ответ:

x=-20

Объяснение:

2(5x+4)+12=9x

10x+8+12=9x

10x+20=9x

10x=9x-20

10x+20=9x

10x-9x=-20

x=-20

1 votes Thanks 1

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